Helen Potter had an interesting summer this past year.

The fifteen year-old demi-god daughter of Zeus and legacy of Hecate (through her mother who had been Hecate's daughter) had returned to Camp Half-Blood at the beginning of summer to find that the pine tree that guarded the camp with some very impressive wards (which also happened to have once been her half-sister Thalia Grace) had been poisoned. The result was that the wards protecting the camp were failing. Being rather skilled in potions, despite what Professor Snape may say, she'd devoted the next few weeks trying to keep the tree alive.

In the meantime, Chiron was sacked as Camp Director, and Clarisse La Rue, Percy Jackson, and Annabeth Chase (children of Ares, Poseidon, and Athena respectively), along with a Cyclops son of Poseidon named Tyson, went on a quest to retrieve the Golden Fleece, in the hope that it's mystical healing properties could heal the three.

They succeeded in bringing back the Fleece, and it did heal the tree. But it also had the side effect of reviving her sister into a flesh and blood person once more.

Having gotten used to having Zeus' cabin to herself by this point, it had been an adjustment for her to suddenly have to share with a young girl she had only heard about. A girl that happened to be her sister.

The two daughters of Zeus managed to get along, and develop a relationship with one another. And though their taste varied, Helen could admit that she'd come to love her sister.

Besides, aside from their eye color and hairstyles (Helen kept her hair long and flowing and had emerald green eyes while Thalia had electric blue eyes and kept her hair short and spiky) they looked almost identical. Of course Thalia was taller, but Helen had larger breast.

So as she packed her trunk to return to Hogwarts for her fifth year of school, the young witch was actually a little reluctant to leave. It was nice to have a sibling, despite the rough patches.

Knowing that no one would come into the cabin without her or Thalia's permission, and knowing Thalia wouldn't go through her things, Helen decided to leave several non-essential items in the cabin.

Among these non-essential items was a ring.

It was a very special ring, as it was the mate to the Lord Potter's ring Helen wore on her hand. She'd received both on her thirteenth birthday, alone with notes from her mother and James, who had blood adopted her, making her heir to the Potter family. The Lord's ring marked her as head of the Most Ancient and Noble House of Potter, of which she was currently the only member. The Lady's ring would mark her husband, or wife if she went that route, should she marry. After that, depending on how many children she had, the Potter family would die out, merging with her spouses house, or continue.

Both rings possessed magic. They would occlude their wearer's minds, hide themselves when their wearer didn't want them seen, and allow the wearers to access the Potter Family Vaults, Manor, and Library. The Lord's ring also gave her control over the wards of the Manor, which she had thus far only been to for brief visits, preferring the company of others at Camp. She supposed that would change when she married though.

But the Lady's ring had some more unique magic. Enchanted by her past ancestors, it could only be worn by someone who loved the wearer of the Lord's ring. Just placing it on one's finger, and the ring accepting them, married the two through magic. It would also enforce their feelings, allowing their love to grow. This was done as a way to prevent adultery and divorce.

So putting the Lady's ring in her jewelry box, Helen continued packing.

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A Few Weeks Later

'This is perfect,' Hera thought as she materialized within her husband's cabin at Camp Half-Blood.

The Queen of the Gods had been trying to figure out a way to punish her husband's daughters ever since she found out about Helen, and ever since Thalia had come back from being a tree. And the best part was that she wouldn't be blamed for anything.

She just needed to wait for the perfect opportunity, and it was here. Of course she'd decided to wait sometime after the opportunity presented itself, but still...this was the perfect revenge against her cheating bastard of a husband.

Walking towards her witch step-daughter's jewelry box, she opened it and pulled out the Lady's Ring of House Potter. Using her powers over marriage, she added some extra enchantments and reinforced others. There were others, but the most important were the enchantment that required love, a temporary compulsion, and a lust enchantment. The last two she added, but the first was already on the ring.

The first she altered so that familial love would be enough for the ring to accept. She added the lust enchantment so that those that wore the rings would WANT to consummate their bond, dream of it in fact. And she added the compulsion so that the one she wanted to put on the ring did.

Satisfied with her work, Hera carried the ring over to her other step-daughter's bed. Setting it on Thalia's pillow, Hera smirked, before disappearing, heading back to Olympus.

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That Night

Thalia walked into her cabin late after the game of Capture the Flag that afternoon. She'd been one of the last campers to shower after dinner, mostly because she didn't feel tired. Plus she'd gotten a letter from her sister which she had stayed out on the steps and read.

That Umbridge woman Helen mentioned sounded horrible.

Changing into her nightwear, a large black t-shirt and boy shorts, Thalia made her way to her bed. Though she found something on her pillow that wasn't there before. It was a beautiful ring. It looked familiar, and Thalia thought she saw something similar on Helen's hand.

Perhaps it was a gift from her father.

Picking it up, she slipped it on her finger, where it instantly re-sized to fit.

The sudden influx of magic running through her body caused the daughter of Zeus to pass out on her bed.

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The Same Time, Hogwarts School

Helen, fast asleep in her bed, didn't feel the influx of magic rush through her body signaling that someone had put on, and been accepted by, the Lady's Ring.

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Olympus

Hera smiled.

As goddess of marriage, one of her abilities was to feel when a couple married.

And Thalia Grace was now Thalia Potter.

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Chapter 1

"More!" she moaned, grasping her lover's dark hair tightly.

Between her legs, the other woman smirked up at her before plunging her tongue back into her soaked cunt.

She gasped as suddenly she felt the other woman shove two fingers into her, and twisted just enough to hit the sensitive spot inside her. "Beautiful," the other woman muttered, before moving up her body, her fingers moving in slow twisting strokes that drove her insane.

"I can't...I can't...Please," she begged.

"Please what?" her lover asked, looking into her eyes, green meeting blue.

"Cum...Please, let me....," she panted.

Leaning down, her lover whispered, "Then cum," before pulling her into a passionate kiss.

The moment their lips met, the spell Helen cast preventing Thalia from cumming ended, and the daughter of Zeus screamed into her sister's mouth as her hardest orgasm yet washed over her.

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Thalia woke up with a jolt, and groaned as she realized she had soaked the bed with her juices again. Resting her head in her hands as she sat up, she asked, "What the hell is going on?"

For the past few weeks, Thalia had been dreaming of her sister. And not in a sisterly way. In fact, most nights she woke up after having rather intense orgasms during her sleep...

Even when she was the one...performing on Helen.

What made it worse was that it wasn't just in her dreams. Even during her waking hours she found her mind drifting to the younger daughter of Zeus. Wondering how she would taste, how she would feel, how loudly she would scream Thalia's name as Thalia brought her sister to orgasm.

Helen was her sister, these thoughts and dreams were beyond wrong. But Thalia couldn't get them to stop.

Even worse, she wasn't sure she wanted them to.

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"Are you alright?" Hermione asked, a worried tone in her voice.

Helen smiled tiredly at her friend. "I'm fine Hermione," she assured the other girl. "I just...I haven't been sleeping well."

The brown haired witch gave her an assessing look. "Are you having more visions?" she asked.

"No," Helen assured her. "Just...disturbing dreams," the demi-god admitted.

She really didn't need the dreams she'd been having lately. Between the Prophet's campaign against her, Umbridge, her fellow students, worrying about Voldemort, class, and worrying about what Luke and Kronos were doing back in the US, she has more than enough stress in her life without the highly erotic dreams she'd been having about her own sister.

The dream she'd had last night involved Thalia putting on a strap-on, fucking her hard in the pussy and ass. And that was one of the tamer dreams she'd had lately.

She just prayed to Morpheus that she'd stay awake throughout Potions and Defense today, she really needed some sleep.

If only she could decide whether she wanted another dream or Thalia or not.