It is a boring hot day watching a movie with your sister at home. She gets so hot, she needs to get more comfortable taking pants off. She tells you not to look. She gets so turned on and starts to pull her top up & her hands down her panties to touch herself. She keeps telling you not to look! Then she gets caught while she cumming because you couldn't help but look. She admits that she was hot and horny and puts her clothes back on.

*it's meant to be a dark looking scene