You're on the couch chilling with your step-sister when you notice that she's not really answering your questions, glued to her phone, and is being reeeeeally fidgety beneath the blankets. Plus, it's summer, so why is she even UNDER the blankets? You rip the blankets off, and it turns out she's finger fucking herself and literally watching porn on her phone RIGHT in front of you on the couch. She's pissed at you and has the audacity to call YOU the pervert?! She claims that since you "want to see her masturbate so badly," she may as well tease you with it. With the way you guys are sitting on the couch, she can masturbate in secret, but you're in clear view of the hallway... so you can't masturbate at all unless you want to get caught. She knows this and goes to absolute TOWN on her pussy—roughly fingering it—keeping eye contact with you the whole time while you can do nothing but watch and squirm. Tags: fingering, stepsis, family, taboo, stealthy, sneak, sneaky, POV