Y/n p.o.v

The next day started off, in a manner of speaking, that was both normal but strange in light of what transpired, between me and Lizzie the previous day and night.

This morning, Lizzie took an attitude towards me that was both abrasive, yet  nervous. She even kept her bitchy tone towards me, but I caught her occasionally glancing over and slightly scooting her chair closer towards mine. 

It was strange, but I guess I understood one thing: she was trying to keep things on the down low of what we did in the shower.

After breakfast, Lizzie was quick to head off to school and Heather questioned me if I had any idea what was wrong with my younger stepsister. I quickly denied any knowledge and Heather accepted that before to have a good day as I left for school. 

Before I closed the front door, however, I heard Heather call to me that she was going to be late back this afternoon.

The school day went by normally, and speaking the way of classes, they were all slow and very boring. I bumped into Chloe just as lunch break was about to end and we started towards the class which we were sharing.

I asked what she got up to the night before and she sighed, she explained all the work and studying she had and that it was a little tiring. So I suggested that she maybe take a day off after classes just to relax. Unfortunately, she was adamant on keeping her studies up, ignoring me as I said that she needed to tone it all down.

When we arrived to class, Chloe just sat at the front as I made my way to the back. I kept glancing her way and saw the mounting piles of notes she was taking and it got me thinking that she really needed to relax, but then I wondered what she did whenever she decided to do so.

After classes finished for the day, I was about to start my way home when Lizzie pulled me to the side and told me that she was going to another party, I tried reasoning for her not to, but she snapped at me that I may be her older stepsibling by two months, but I didn't have anything to say in what she did.

I sighed before accepting, cause there would be no reasoning with her.

"Don't tell mom though. Do that for me and I'll visit your room tonight~." She spoke the second part more quietly and blushed a little. I accepted that and Lizzie looked around before kissing my cheek and rushing off.

She was trouble, and she will one day get me in a lot of trouble.

~Timeskip~

When I got home, I've seem to notice that Chloe's belongings were set out on the kitchen table. No doubt she was able to be doing some more studying, but the problem was she was nowhere to be seen.

Then I heard a thud upstairs and started my way up to find a noise coming from her room. Small moans and I thought that something fell and she got hurt. So quickly, and without thinking of other implications on the moans, I slightly pushed the door open.

"Chloe, are you alright?" I asked looking to the floor where I expected to see her laying but she wasn't there, my eyes then slowly moved towards Chloe's bed and that was where I saw her.

Her lower uniform was discarded on the floor, her hand down between her legs as she was biting a finger to muffle her moans.

Our eyes locked as I froze in place at me catching Chloe doing this.

"Uh..." was all I managed before she shrieked and immediately took a pillow to cover herself instead of throwing it at me and calling me a pervert, she was so embarrassed at being interrupted and the glow in her cheeks were showing.

"Y/n! I didn't expect you back so soon!" she said to which I said that of course I would be back at this time seeing we finish classes at the same time. But she shook her head, saying her final class was cancelled, due to whatever reason it was, and so she came home early. 

She said that she was taking my advice on trying to relax and attempted to ease herself, just not expecting me to be home so early.

I rubbed the back of my neck. I should've just walk out the door and pretend I saw nothing. 

Although, because of Lizzie, I have seen much more, but this is Chloe. She was much more refined then your younger stepsister.

"Ah! Ah!" I heard Chloe start to moan again and my eyes turned back to her. 

The pillow she used to keep herself modest, was dropped on the floor and her legs were up and apart as she dug a finger into herself.

"Oh, how lewd of me. You seeing me like this when I should have more control over myself." She moaned in embarrassment, but never stopping from touching herself before looking to me. She then said something that completely surprised me.

She went on about the fact of having her younger stepbrother watching her touch herself, was strangely arousing to her. Chloe shifting herself to give me a better view of the finger that was pumping into her wet pussy.

"Do you like seeing me like this too? (ah) don't you want to take care of me, Y/n?" she asked with her cheeks glowing with a pink hue.

I pointed out the fact that we were step siblings, even though I did fuck Lizzie the previous day. I already dug the hole of depravity because of Lizzie. If I went so far as to do the same thing with Chloe, then I would be diving head first into the pit.

"Please, you said I should relax earlier, so won't you help me?" Chloe asked as she continued to pump her finger inside herself with her hips bucking, her green eyes locked to mine before she started to crawl towards me and knelt at the foot of the bed. Her fingers hooked into the waistband of my pants and pulling me closer as she went to unfasten them.

"Please stepbrother."

God the way she said that was so out of character for her, her gaze was lustful and desire filled which was the exact opposite of who Chloe usually is.

But then again could that have all been a masquerade, a facade to hide a more perverted side to the positive public figure she was. I guess I was about to find out as Chloe finished unfastening my pants and tugged them down with my boxers enough so gravity took over.

The whole situation caused me to get hard so my erect shaft shot up and aimed towards Chloe's face as she stared. Her eyes expressing awe before she tentatively touched my phallus causing it to twitch before her hand fully closed around it and she leaned forward to kiss it.

Her green eyes looked up as she was bending forward and sticking her ass up in the air whilst taking my shaft between her lips, the warmth of her mouth enveloping my cock and I couldn't help but lean my head back and moan.

 I knew this whole situation was wrong, but I just couldn't bring myself to stop it.

I mean I've already took Lizzie in the shower, so I might as well do this with Chloe if she wants me to.

I looked back into her green eyes as they were staring up into mine with a lustful gaze before Chloe began bobbing here had at a rapid pace and the oral treatment was feeling amazing, I couldn't deny that.

I expressed how good it was feeling by letting out a moan and even thrusted my hips forward into her mouth, Chloe's eyes closing as she held onto me whilst taking more of cock into her mouth.

I reached down and ran my hand through her hair as enjoyed the feeling of her lips gliding along my cock, her tongue running along its length before Chloe started to pump her hand along the base of my cock to coax me to cum and I couldn't hold it.

Her cheeks puffed out a little but she gulped down my cum with a surprising amount of ease before pulling away from me and wiping her mouth, Chloe kept her gaze trained on mine as she smiled before turning around on her bed and sticking her ass out towards me. 

The look in her eyes telling me to take her, not asking but near enough pleading.

She was stressed out, so I was gonna relieve her.

My hands took a hold of Chloe's hips and I plunged myself into her dripping pussy, pushing all the way to the hilt as her head fell back to stare up the ceiling from the penetration. 

Her lips turned up in a grin as I began to thrust myself into her and Chloe didn't hold back her moans, I was unsure wherever it was by means to show her true colours or the fact she was just so desperately horny.

Regardless to the reasoning, I took my older stepsister from behind as she moaned for me.

Chloe's hips pushed back to meet my thrusts as she met my gaze, her lips turned upwards as she moaned that I was the best stepbrother ever for helping her like this. Her body pushing up so she leaned to my chest and kissed my cheek, her voice soft as she said that she loved me but more than the stepsibling relations.

"If we weren't technically related, I think I would end up dating you." She smiled before gasping and then giggling as I bent her onto her hands and knees again, my hips gathering more drive behind them as I pumped myself into Chloe.

Slapping and clapping noises filled the room but not as much as her moans which were begging for me, this really wasn't the Chloe I knew. This was someone completely different but the same at the same time, this may be Chloe by the person but not by the personality. 

Not that it stopped me from getting faster.

"Oh, I'm cumming, stepbrother!" she moaned as she came before I pulled out and Chloe whined a little before gasping as I rolled her onto her back.

She stared up at me before giggling as I immediately thrusted myself back into her and resumed where I left off, she said that she knew I was wanting this as much as she did. Her arms hugged my head close to her chest as she again said she loved me and that I was the best stepbrother she could have gotten.

She acknowledged the fact of our relation much more than Lizzie had done in the time we had been step siblings. The fact Chloe was calling me by the title as we were having sex actually added to the depravity, but also made it more arousing so I was getting faster and rougher.

She was enjoying it all very much even going as far as to lock her arms and legs around me.

"You're not pulling out until you've cum inside me!" She began gasping and I grunted from the feeling of her pussy gripping down tight around me. She wasn't in the need to wait as I buried my head into the crook of Chloe's neck as I started to cum inside her.

She trembled as I filled her up before I finished, her arms and legs unraveled from me and she pulled me to face her.

She was flushed bright red, cheeks glowing and her lips turned up a smile as she leaned close. Her voice gave a quiet whisper.

"I love you, stepbrother!"

We locked our lips in a deep and passionate kiss, more than what was acceptable for step siblings, even if they did kiss. This was wrong, but I didn't regret anything. I saw the true side of Chloe this day, so that made it all worth it.

~Timeskip~

When nighttime came, Lizzie kept to her word for me keeping quiet and was quietly moaning beneath me as I was thrusting into her gripping snatch. Her head was in my shoulders as she was moaning for me to fuck her harder, but I had to keep it all quiet otherwise we would be found out.

Then, my bedroom door started to open.

"Y/n, I wanted to thank you for helping me earlier~" Chloe spoke in a sultry voice, both me and Lizzie looking to see Chloe donning a silky nightgown.

"Oh, what's this now?" She asked as she spotted me and Lizzie in the middle of our act of sexuality.

"Oh boy." Looks like I have some explaining to do.