You're on the couch with your step-sister Sinn Sage, watching TV & she's wearing white panties and a small crop top. She catches you trying to take a pic of her big phat booty and she calls you out on it!! She knows you've been checking her out a lot lately so she calls you a pervert but then gets a sly look on her face.... she's such a troublemaker!! She teases you with a shot of her butt first. Then She tells you to stand in front of her & asks if you have a panty fetish. She pulls her white cotton panties up real tight & tells you to pull out your dick & start stroking. She pulls up the thin fabric right up against her pantied pussy & starts grinding & pulling the fabric tight in a rythemic motion. She even puts her hand underneath her white panties to rub. Sinn lifts up her legs & continues giving you a pantied pussy tease until you cum all over her white panties!!! Shhhh you can't tell the parents ever so she knows she can ask a LOT of favors from you from now on! Maybe this was her agenda all along!?