Sarah greets you both.

She was still dressed, no sign of the strapon. "Someone is breaking the rules." she said, stopping you as Elena walked past you and dropped off the things you both bought. Elena took your bags and put them in the living room, then came back "Elena." she said, nodding.

Elena took your shirt off, slowly, grabbing your tits as she pulled your shirt up, then tossed it aside. She unhooked your bra and grabbed your tits again, this time she played with them. You know she'll find out you are wet. She undid your jeans and pulled them down, then your panties, feeling your pussy. You were now naked and turned on by your sister stripping you naked. "She's wet."

"Good, she can cum when we let her." Sarah said, sitting on the couch "No lingerie. She needs to be punished for that show she wanted to give us." she said.

You and Elena put away the stuff you bought, Elena took your lingerie upstairs and you sat on the couch, installing the new games you bought.

After three hours of playing a game, you paused as Sarah stood you up "Punishment time." she said, taking you to the stairs.

You were going to see what her size is, and if she got two. She took you into your room, then left with Elena.

You stood, facing the bed, fully naked, and alone. "Turn around." Sarah ordered. You did so, slowly and saw Sarah enter, naked, with a thick strapon, with Elena coming in, with the strapon you bought, on. You could resist, hoping Elena didn't do that, so it would impress Sarah into not using that. But she might enjoy it, and it might make things worse. Or you could just submit without a fight, what Elena might've not done.