Jay's a little taken aback, teasing her about how short her short-shorts are. Allie giggles and says she likes to let her skin breathe! It's not like he hasn't seen her skin before -- they have a pool, after all.
She then exaggerates not being able to reach her feet, pouting and giving Jay pleading eyes. Although Jay is a little shy about it at first, after some prompting, he gives in and starts by massaging her legs. The tension between them, fueled by their secret desire for each, mounts as he eventually moves onto a sensual foot massage.
Although they playfully act like the massage is a chore, they're fooling no one. The erotic foot massage leads to a topless massage as their hunger for each other intensifies. Jay seems to be nervous, wondering if they should really be doing this, which Allie teases him about. No one's home and it's clear that they have feelings for each other, so why not give in? Sure enough, Jay isn't able to deny himself any longer.
They both strip down and it's now Allie's turn to get her hands all over her step-brother. She likes what she sees, and it isn't long before she takes his cock into her pussy, enjoying the ride. They both have a lot of explaining to do to when their parents come home!