She gives in

“Please Eve. I need this.” Ai says. “You need this.”

Eve sighs and says, “Fine. Just this once.”

Ai smiles and says, “You won’t regret it.”

Ai keeps wading into the water, and once she is waist deep into the water, Ai turns around an lays herself down to start floating. While floating she spreads her legs, as Eve walks into the lake, and goes up towards Ai. Eve wades in between Ai’s legs, her dick slightly floating on the water. She grabs Ai by her hips and slides her dick into her little sister’s pussy. Ai gasps when she feels her pussy get spread by Eve’s dick, and feels Eve pierce her hymen. Eve moans when she feels Ai’s tight pussy squeeze around it.

"Oh, god, you never told me you were a virgin." Eve says as she's still moaning.

"I've been waiting...a very long time." Ai says as she wraps her legs around Eve.

Eve starts slowly fucking Ai. Every gentle thrust causes small ripples to appear on the surface of the water. This is how Eve used to get fucked by her last boyfriend, but they were just on a waterbed. The way Ai looks up at her must be how she looked at him. The way Ai’s boobs bounce must be how her boobs bounced. The pleasure she’s feeling from her dick must be what he felt. The more Eve fucks her sister, the more she is compelled to fuck her harder. Soon the ripples on the water around them turn into waves. They splash against Ai’s body, making her all wet. Eve can hardly believe it but her sister actually looks incredibly hot and sexy like this. It is the first time she has seen her sister in such a way.

Ai can’t believe how lucky she is. First she discovered she has been in love with her sister. It started when she first met her after months of being alone in the tower, but thought she was just happy at being reunited with family. It is only after the encounter with Erin that she realized what she felt was actually love. Now she is experiencing that love by having sex with her, and on top of that, Eve grew a penis. Now she has something by which the two of them can connect. It feels so good to finally have her sister inside her. Both physically and emotionally.

“Oh, Eve. Yes. Fuck me, big sister. Pound me with that big cock of yours.” Ai moans loudly.

When Eve is fucking her so hard the water starts splashing in her face, Ai bets Eve is close to orgasming.

“Eve, you’re close to cumming, aren’t you?” Ai says. “Cum inside me, big sis. Fill me up, cream your baby sister’s pussy. I want to feel you spurt inside me.”

Eve feels she shouldn’t. What if she gets her pregnant? Can she even? Her dick is about to burst. But it feels like it wants to. Is this how guys feel when they are about to cum? Do they all have this yearning desire to unload inside a pussy?

While Eve is deep in thought, suddenly her dick starts jerking on its own. Before she knows it this new attachment is pumping and she feels like something from deep inside her is going into her sister.

“Yes! Yes, Eve!” I can feel it! Yeeeees!!!” Ai screams as she orgasms as well, as suddenly a bright light fills the whole room as the two sisters climax on each other.

Outside, the top of the tower opens up, and a bright beam of light bursts outside the top of the tower. The light then shines beams to the tops of the nearest other towers across the world. Those then light beams to the towers nearest to them and so on until all the towers of the world are connected by beams of light. Then each tower releases a wave. Every creature on earth feels this wave as a subtle vibration that goes through their whole body. Even Commander Myada and every member of Rose squad feels it, but they can’t quite place how it happened or what it does. Most people just assume it is a simple shiver going down their back and think nothing else of it. But everyone keeps their eyes on the sky as they witness the beams of light cross their vision.

Melissa's sitting outside with a bottle of wine, and looks at her communicator. Lizette hadn't contacted her in hours, but someone performed the ritual, and one way or another, that was going to inspire a change.

"What the hell" she figured, as she opened the wine, and poured herself a glass.

This was where things were going to get interesting.