Your sister is so glad you have you staying with her and her husband for a few months. After some time at their house, you decide to go out for the night so that they can spend some time together without you there. However, while you're out you get a headache and decide to head back, sneak in for something, and then go again. When you get there though, your sister is on her bed in lingerie, laying on her back and waiting...

She looks so hot, and you can't help but get a massive hard-on from looking at her. You can't stop yourself from looking... and she finally spots you, upset at you staring in without saying anything. You confess your excitement, tell her how beautiful she looks, and she has a confession of her own... they've been trying to have a baby and it just isn't happening, so they've been stressed out.

Her body and outfit is such a turn-on and you can't handle it. You tell her again that she's so beautiful, and after a few times of her saying that you shouldn't say things like that about your own sister... she gives in. The sexy feeling she has right now needs attention. And you'er perfect.