You walk into your sisters room, she's annoyed and upset, it's so hard being a girl. Mom is out, and she had made her do the laundry. You wouldn't understand, you don't have to do anything being a boy. She wishes there was a way she could change things, even just for a day. You tell your sister you know a way for her to be a boy for the day, but it means having to swap bodies. She doesn't believe you at first, and she certainly doesn't want her brother in her body, feeling and looking at her tits and pussy! But eventually she gives in and agrees, you tell her to close her eyes and countdown from 5.... You're in your sisters body, and you can't believe how soft and smooth everything is, how good it feels to squeeze your tits and rub your pussy. Your sister runs off to fuck someone with your cock, and now is your time to play. You rub your pussy until you cum, but you want more, and you know mommy has a squirting dildo hiding away....