Anna’s too horny to leave him alone

Anna tried to leave Billy alone for a few days, to let him recover and get back to normal. Partly because bringing him down after he was back to his best again would be all the more satisfying, and partly because she felt like ignoring the power she now held over him was a deeply satisfying power play by itself - “look, you’re not even an interesting enough bug for me to squash”.

It wasn’t true, of course. Anna LIVED for this now. Seeing him flop over, humiliated and ruined, was all that filled her mind. But the idea of her big muscly brother being hit with concern that his nerdy younger sister had actually gotten BORED of knocking him out, and the strange mix of gladness and despair that would stir up in his boxing champion brain, was too delicious to ignore.

So Anna tried. When the urges hit, and she just got too fucking horny, she tried to satisfy herself with the videos she’d taken as part of her experiment documentation. And satisfy herself she did. Oh yes, she satisfied herself time and time again. But pleasing as it was to see Billy’s downfall on her laptop screen, to relive his confusion and humiliation… Fuck, she just needed MORE.

Anna was a smart girl. Strong willed. So she lasted four days. Longer than most others would have been able to hold back, when feeling the urges and horniness that this long-repressed nerd was. When the object of her fascination had a bedroom directly next to hers. Fuck, hiding her squeals as she fingered herself to those videos, listening to herself taunt the fallen test dummy through her headphones, was hard enough. Picturing Billy’s mind in turmoil over the way Anna had humiliated him, then dumped him to the wayside. Just one room over. She couldn’t let him hear her. She wanted to imagine him squirming. Her cool, calm, athlete older brother, feeling worthless that his nerdy sis was bored of knocking him out. FUCK.

Family dinners were the hardest. Trying to act calm and disinterested in front of Billy, while her thighs squeezed together tightly under the table. Trying to keep her breathing steady while a blissfully unaware Heather asked Billy how his boxing was going.

Four days. Under those conditions, Anna lasted four days. Four days of ignoring Billy, of acting too good for him. Of letting him recover, and fingering herself furiously the second she was in private. It was more than most could do. But Anna knew she needed more. She needed something big.

Anna told herself it would be the last time, the true last time. She just needed one last big hurrah, to get all of this warm gooey pleasure out of her system. To revel in her power. Her ultimate victory. The undeniable end of their sibling rivalry, and any trace of it that remained. To celebrate the experiment’s success, to celebrate his newly-implanted “forever weakness”, and to have a big, final send off before he was officially put on the road to recovery, so he could reclaim his former glory while leaving Anna the secret key to his defeat, and…

And frankly, to get Anna off. She was so, DESPERATELY fucking horny right now, she could hardly think… There was only one thing she wanted. And it was all she could fucking think about. It would be the last one. The sendoff to a project well done.

And it had to be big.