My stepsister spreads her legs to tempt me.

She was a total she-devil, she always found a way to get on his nerves, pushing him to the limit with her flirtatious ways and so out of place for a relationship like theirs, although they were not blood relatives, they could not deny that their parents had included them in that family and even less could they deny that the attraction they felt for each other was something that led them to devise ways to break those unwritten rules. However, that afternoon when he saw her in the living room, with her legs wide open, he knew he could no longer refuse that forbidden dessert.