Stroke for your sister's dirty socks. Your sister has always been the naughty one, while you have tried to follow the rules. She has always been the one who leads you into mischief of some sort or another and she knows you've been staring at her feet for ages now. Even though you've been trying to be "good", she has no trouble coaxing you into jerking off for her dirty socks and then cumming for them. [ includes elements of: dirty socks, roleplay, taboo, femdom pov, joi, cum countdown, pov foot worship, orgasm control, feet joi, bad sister ]