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Fem!Reader is the sister of Sandor and Gregor.

Set in Season 3. (Joffrey is king, with Sandor as his Kingsguard)

While her brothers both work as knights for the Lannisters, (Y/N) is looking for a different sort of employment: as a highborn resident of King's Landing, she has always been close to the Queen mother. One day, Cersei reveals to her that her longing is not unreciprocated, but that their relationship must remain anonymous to avoid a scandal. So (Y/N) becomes Cersei's nameless paramour...

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I was lying back on the bed, sighing with the afterimage of bliss. Cersei and I had only begun this relationship a few weeks ago, but already it was like a drug I couldn't live without. We saw each other nightly, and sometimes during the day too, like right now.

I couldn't even quite remember how we had first met. Was it when Gregor first became Tywin's sworn sword? Or when Sandor went to join him? Or before all that, in childhood, perhaps? Somehow, Cersei had just always been in my life - never too present, but always there in a way. And then I had moved from Clegane's Keep to King's Landing, and seen her as if for the first time. I did not just see the king's consort, or Lord Tywin's daughter, I saw her, and suddenly I understood why she was said to be the most beautiful woman in the Seven Kingdoms and why men all over the continent lusted after her.

And she had seen me, too. And that was that.

Worshipping that beauty had become routine, but never ordinary. Each time was a new experience of joy and unscaled heights of feeling.

Cersei was already slipping into her dress again. She didn't have much time before her next meeting, but that was fine by me. We didn't need much time to find our pleasure.

Reluctantly, I heaved myself off the bed and walked over to her, tucking a stray lock of hair behind her ear while kissing her cheek. "There, darling. We don't want you looking disheveled in front of the council, do we? What will people say?"

"They're already saying enough", Cersei warned. "Your nightly visits have not gone unnoticed. People are wondering who this mysterious paramour of mine might be."

"Which means I've managed to conceal my identity well", I concluded, smoothing her hair over again. "Don't worry, love. I grew up with two older brothers - I know how to sneak around and keep out of trouble."

Cersei did not laugh as I had hoped she would. "I'm serious. We need to be careful. If someone discovers us, we need to stop this whole affair immediately. I can't put my reputation at court at risk."

That statement instantly killed my own jovial mood. "We won't be discovered", I said, shaking my head. "I've managed to stay out of sight so far, haven't I? No one has a clue it's me who is visiting you. Besides, if people are looking for a paramour, as you put it, they'll be expecting a man anyway. I'm entirely unsuspicious."

"One might think you were a master spy, the way you're speaking about yourself", Cersei joked conciliatorily.

"What can I say", I shrugged with a grin, "I'm a woman of many talents."

"Oh, you sure are", Cersei smirked with a downward glance.

I laughed and steered her toward the door. "Now go, so you still have time to enjoy those talents later. You'll be late if you don't hurry now, and you know how Baelish hates to be kept waiting."

"He just can't wait to get back to his whores - as do I", Cersei replied, then gave me one last kiss before rushing out of the door.

I stayed behind, grinning to myself as I began to wonder what to do with the rest of my day. I didn't exactly have any occupation here other than being Cersei's lover. She paid for anything I had need of, and I had not yet found any proper activity I would have liked to commit to in the time I had been here.

Sewing had never been my forte, nor had any other kind of handiwork that required accuracy and patience. I enjoyed riding, I supposed - but there were only so many rides one could take through the same woods before it became boring. It wasn't a good day for riding, anyway, it had rained yesterday and all the trails were muddy and dangerous for the horses to traverse.

So I was stuck looking for something else to do. Perhaps one of my brothers would be in the training yard. As a child, I had often sparred with them, getting my ass handed to me time and time again but never minding.

Now, of course, we could no longer do that. I was a lady, and expected to act like one. I scoffed at the thought. As if it did any lady any good not to teach her to defend herself. But the world was what it was, and I could not change it, and so watching my brothers spar was the next best thing to fighting myself.

When I had made my way to the yard, I found neither of my brothers there, but instead someone who was even more enjoyable to watch: Jaime Lannister. He flew through forms fluidly with a grace few managed to copy, but it seemed to come effortlessly to him. His fighting style was like a dance, one no partner could keep up with.

Jaime was alone in the training yard, fighting against air, and hadn't noticed me yet. I quietly took a seat in the stands, not wanting to break his focus.

He spun around, swinging and stabbing at the same invisible point, and finally ended the fight with a hard downward slash of his sword, leaving him kneeling in the dust.

I applauded, making him startle and pivot to face me. "Lady (Y/N)", he acknowledged, "how long have you been there?"

"A while", I replied. "Long enough to see you mess the unlucky lad up really well."

Jaime laughed at the jest. "I'm training for the tournament. Wouldn't want dear old Father to be disappointed in my skills."

"Tournament?", I asked in surprise. I hadn't heard that there would be one.

"Not a large one", Jaime explained, "just for the knights here, in honor of my father returning to the city."

"Lord Tywin is returning? Has the fighting in the Riverlands ceased at last?"

Jaime nodded. "We cornered the Blackfish, drove him back to Riverrun and ended it there. The Freys are in charge now."

I nodded, but my mind was wandering elsewhere. Tywin being in the city was a risk. He would not be as blind to his daughter's activities as others. We would have to be looking over our shoulders more than usual.

I rose to my feet. "Well, I'd say you're in great form. Your father has nothing to complain about." With a nod of my head, I started walking back to the castle, hoping Cersei would be back soon so I could break the news to her.

👑

As it turned out, I didn't need to. Tywin had been at Cersei's meeting.

"You know what this means, right?", I told her later that night.

"That he'll make himself a nuisance and try to infringe on my life, as always?", Cersei retorted. "Tell me something I don't know."

"If he finds out, we're fucked", I insisted. "He'll probably have me killed and you quickly married off to whatever Lord he can most quickly get an arrangement with to prevent the word from spreading further."

Cersei grimaced.

"Someone will no doubt have told him about the rumors already", I went on. "It's only a matter of time before he decides to investigate. We need to be ready for that."

"An alibi?", Cersei asked, catching on.

"Precisely", I nodded. "A reason why I need to be visiting you at such odd hours, should he discover my identity, and at the very least a decoy if we're lucky, to put him on someone else's track. He's smarter than the other nobles at court and has personal interest in finding out what is going in. We mustn't underestimate him."

"So what is your suggestion? What are you coming to my room for every night?"

"Planning Joffrey's wedding?", I offered. It was the first thing I could think of, with the date edging ever closer.

"Why would you be involved with that?", Cersei asked. "No, that's not it." She pursed her lips in deep thought. "How about this: you have been helping me devise a plan for the defense of King's Landing should Stannis return. You come from a family of high-ranking knights, it would make sense that you have a military mind, if not the brawns to actually fight."

"Sounds good. I do indeed know some things about battle. Just one problem: we don't have an actual plan like that. He'll want to see it."

"So we make one", she shrugged. "If we invest a few productive hours now, I think we can convince him we've been working on it for a while. It doesn't need to be revolutionary - we never claimed it was a great plan."

I nodded my agreement. "I think that might just work. But first..." I let my voice trail off as I grinned up at her.

"You need some motivation?", she guessed with a smirk.

"I do. Desperately."

"Well, I think I can help with that", Cersei mused, sliding her hands up my shoulders to the nape of my neck, undoing the ribbon of my dress there.

Once she had pulled it down to my waist, I took her hand and led her over to the bed, setting her down on it gently and climbing on top of her.

I kissed a path from what her gown exposed of her cleavage to her collarbone while I straddled her lap, settling into a comfortable position.

"We need to get rid of this, love", I tutted, tugging at her dress.

Cersei pulled it up her body from underneath my legs and slipped her head through it, her shoulders still caught in the sleeves.

"That's plenty", I grinned and slung the gown over the headboard, fixing her arms in place there. "Now..." I ran a hand up her bare abdomen, making her shiver. "Let's find that motivation."

Adjusting my skirts, I slipped a hand beneath them to between Cersei's legs, stroking the tender skin there.

She let out a quiet whimper, wanting me to start already.

"You want this?", I teased, my fingers circling around her entrance as I leaned down close to her face.

Her hands came up to cup my breasts. "Yes", she breathed urgently. "Now."

"Your wish is my command, Your Grace", I said with joking deference, consuming her mouth with my own just as I let three of my fingers enter her in a smooth plunge.

Her moan merged into our kiss, her hips shuffling on the bed to invite me in deeper.

"So greedy", I laughed against her lips while her hands clenched around my breasts, holding on to me as if I was her lifeline. But I complied with her request, pushing in harder, lengthening my thrusts to draw out her pleasure.

My free hand wrapped around her jaw, holding it firmly in front of me as I looked into her eyes, relishing the fading of her composure and the deep satisfaction in her eyes as she lay panting beneath me. "There's a good girl", I purred. "Your pleasure is my pleasure, too."

"More", she rasped between labored breaths. "Give me- all you've got."

"Don't say I didn't warn you", I replied with a smirk, then righted myself, using the weight of my hips to drive into her deeper, stronger.

She jerked up, held back by me on one side and her dress on the other, and let out a cry of ecstasy as her body shook once, then twice with the waves building up inside her.

"Do you still want more?", I drawled as I rode her hips, grinding into her hard.

"Yes", she pressed out between more stifled cries.

I nodded in acknowledgement, then conjured all of my strength to plunge into her again and again as hard and deep as I could, quickening my pace to drive her to the edge.

"Yes, yes, (Y/N)", Cersei cried. "Yes-" She stopped being able to form words as pure pleasure washed over her, rocking her body up and down while I kept on pushing. Her nails dug into my skin, and I could feel fluid spilling out over my hand, soaking my skirts and the bedsheets beneath her flailing legs.

As the last of her orgasm subsided, I leaned down again to kiss her deeply. "Shall we get to work?", I grinned.

👑

I was just getting back from bringing a few of Cersei's gowns to the washerwomen when I heard footsteps behind me, echoing loudly in the otherwise empty hallway. They were heavy steps, those of a man, so it was clear that whoever it was was following me. There was no other reason for a man to be down here.

I turned around and found myself face to face with Tywin Lannister.

"My lord", I said, inclining my head slightly.

"I'm sorry if I surprised you", he said lightly. "I just saw you coming down here earlier. Those were my daughter's dresses, were they not?" At the sight of my surprised face, he added, "No one else wears so many Lannister colors."

I nodded. "Yes. I was just taking them to be washed."

"I figured as much", he replied, gesturing to the room behind me, then studied me more closely - taking in my dark hair, my broad build, and coming to the obvious conclusion. "Lady Clegane. It's been a long time, I almost didn't recognize you."

"I suppose it has - although I've been in the city for some time now already. Clegane's Keep got rather lonely without my brothers."

"And how did you come to fetch the Queen Mother's laundry? Doesn't she have maids for that?"

"Oh, of course she does. I was just available and needed to check on my seamstress's progress in the lower levels anyway, so I offered to take it with me."

Tywin nodded to himself. "Mh-hm. So you spend a lot of time with her?"

I tried to shrug nonchalantly. "You could say that. We get along well."

"Then maybe you could enlighten me on a certain matter", he said.

"Maybe", I replied. "What is it?"

"Surely you've heard the rumors going around."

"You'll need to be a bit more specific than that, my lord", I half-smiled when he didn't elaborate. I hoped it didn't look too forced. "Rumors breed in this place like ants in sugar, as you well know."

"I am talking about the rumors that my daughter is... having inappropriate contact with someone." He ground his teeth as if it was hard for him to even admit to such shame.

"I'm afraid I know nothing of it, my lord. I've not seen her with anyone in a way that would suggest such things, nor heard anybody claim knowledge about it."

"So there's no truth to it?" His tone sharpened.

"Not as far as I know. Why don't you just ask her, though, or her maids? I'm hardly the best source of information in this regard." I knew of course, that the maids had never seen me enter Cersei's chambers. We always waited until after they had all gone to bed before I slipped inside.

"If she does have an unlawful companion, do you really think she would tell me?", Tywin retorted. "And her maids are loyal to her, they would lie, too."

"I suppose that's true", I admitted. "But I honestly don't think there's anything there to lie about. These claims have no basis."

"I'm not so sure about that", Tywin replied and cocked his head, studying my face.

"Where did you hear about this supposed lover, anyway?", I asked to conceal my nervousness under his gaze. "Who started this foul gossip?"

"I've heard whispers", he answered vaguely.

I scoffed, hoping it was convincing. "There you have it, then. Lies, spread by our enemies to sow discord among us! And it seems to be working." I levelled as disapproving a gaze at him as I dared.

"You seem intent on proving me wrong about this, Lady Clegane. Is there something I should know?" He lifted an eyebrow at me.

"What you should know, my lord, is that our enemies will stop at nothing to destroy us from the inside out. My brothers have both served your family faithfully for many years, I would ask you to assume the same loyalty from me."

"Of course, my lady", he backtracked, as if remembering his manners suddenly. "Forgive me, I've just learned to be cautious of everyone."

"Caution is a good quality in times like these", I agreed amiably and tried to change the topic. "I'm sure not everyone is happy with your recent success at the Twins. The country is in unrest as it is, and now our side has brought the pot to a boil. We have to be careful not to get burned."

"I have it under control", Tywin said in his usual authoritative, self-assured voice. "We mustn't underestimate the Northerners, to be sure, but they don't hold the throne. We do. With the young wolf gone, they should not be giving us too much trouble anymore."

"Which is exactly why they've pivoted to tactics of low cunning like this", I said, hurrying to seize the opportunity to further discredit his suspicion. "They know they don't have the numbers or the influence anymore to win the war by normal means, so they need to stoop to tricks to divide us. I wouldn't be surprised if they're the ones who sowed these rumors."

Tywin hummed in consideration, not convinced yet but at least opening himself to the idea.

"Though I wouldn't put it past Stannis, either", I added. "He's tried once before to attack us with filthy claims. Who's to say he wouldn't do the same again?"

Tywin remained silent. Did he know Stannis's first claim had actually been true? Surely not, or he would have spoken out against it more vehemently.

"I think I would like to speak to my daughter, after all", Tywin said suddenly. "Would you walk with me?"

"Of course, my lord." I changed direction, starting on the path toward Cersei's chambers.

"I don't think Stannis has anything to do with this", he said, responding to my earlier question. "Nor do the Northerners."

"Who, then?", I asked innocently.

"One thing I keep asking myself is: who would benefit from this rumor? When Stannis said those things about Cersei's children, well, that was to discredit their claim. But who does it serve to make us believe she has taken a lover? She is widowed, there's no imminent suitor or remaining family of her former husband that would be angered and driven to action by her infidelity. If shame is all they want to bring on us, there would be easier and more effective ways. It just doesn't add up."

I didn't know what to say to this. He had caught me out in my bluff. "I do not know how our enemies think, my lord. Perhaps it was the most believable thing they could come up with, given that Her Grace has already been accused of unfaithfulness once before."

Tywin gave a short huff of dismissal. "Doesn't matter, I suppose. If there is no truth to it as you say, we can ignore it and move on. The lion doesn't concern himself with the opinions of the sheep. Ah, here we are."

Indeed, we had reached the door to Cersei's chambers. I knocked. "Your Grace?"

After a moment, there came a reply. "Yes?"

"There's a visitor for you here, your lord father."

"Send him in", Cersei called back.

I curtsied to Tywin and turned to leave. "My lord."

"Wait", he called after me in that calm but commanding voice.

"Yes, my lord?" I turned back around with a forced smile to hide my anxiousness.

"I'd like you to attend this conversation."

"Whatever for, my lord?", I asked.

"To remind her of any details she may have forgotten." His tone made it clear that he was not expecting her to actually forget anything by accident, nor that this was actually the reason he wanted me there. "You've just claimed loyalty to our cause - here's your chance to prove it. Help me get to the bottom of these disgusting rumors so we can be done with them."

I swallowed hard, then nodded and followed him into the room.

"Father", Cersei said when we came into view, standing up from her table, "how good to see you. (Y/N)." She nodded in my direction. "To what do I owe this pleasure?"

"There are some things I wanted to talk to you about", Tywin began. "Something I was hoping you might help clear up for me."

"Do proceed", Cersei said, a slight note of suspicion in her voice that was likely inaudible to anyone but me.

"Are you aware of what people have been saying about you of late?", he asked.

"Should I be? I thought you taught me that we lions aren't supposed to concern-"

"I know what I said", Tywin interrupted impatiently, "it was a rhetorical question. Of course you know, you've always had your sources. Why would you pretend you don't?"

"Gossip hardly interests me", Cersei replied coldly, crossing her arms. "I don't see why I should pay it any mind. People will say whatever they want to, that's how it's always been."

"So it's entirely imagined? There's no secret paramour?"

I almost flinched at his phrasing. It was the exact same word Cersei had used just yesterday.

"No", she said without missing a beat. "There isn't."

"Do you have any idea where these rumors might come from, then?"

She shrugged. "I don't know. I speak to many people every day, perhaps someone read too much into a recurring visitor. Has anyone said who this mysterious lover is supposed to be?" Her voice was amused, easy-going, the perfect image of someone who didn't care in the slightest what accusations people were making against them.

Tywin declined. "No. But someone has allegedly been seen entering your rooms almost every night." He shifted his position in his chair. "Don't get me wrong, Cersei, I have no problem with you enjoying yourself, seeing as you've been without a husband for two years already, but discreetness would be well-advised. Such rumors have the potential to harm our reputation. One day, you might need to marry again, and if your suitor believes these claims, he'll name you a harlot and decline the proposal. That would be most unfortunate, would it not?"

Sympathy, a different approach - a rare one, coming from Tywin - but not one that would be any more effective. I almost laughed. Cersei would not sell us out no matter what he did. He did not know his daughter well, apparently.

"Naturally", Cersei returned smoothly. "Although", she chuckled, "I think I might have some idea of who people saw and assumed to be a lover." She walked over to the cabinet and retrieved the papers we had filled with sketches and lists last night. "You see, Lady Clegane here has been helping me come up with ideas for the defense against Stannis and his troops in case of his return. We have been working on it many a night."

Tywin's gaze shifted to me, studying me indecipherably. "I see", he finally said. "What have you found so far?"

We walked Tywin through our hastily constructed plan together, and though he wasn't particularly impressed with it, he seemed content with the explanation. Eventually, he nodded. "I'll mention your ideas to the council", he said, clearly intending no such thing, and prepared to leave. "It's time I visit my son, too. If you'll excuse me." There was no need to ask which son he meant.

As soon as the door fell shut behind him, both Cersei and I let out a deep breath of relief. "Well, that went swimmingly", she commented. "Do you think he's suspicious at all?"

"Maybe", I considered, "but if he is, he doesn't seem to care too much about addressing it. I think we're safe for now."

"I could think of a few things to do with that safety", Cersei said sweetly and let her eyes trail down my body.

With a grin, I locked the door and followed her to the bed.