In this adult stepsibling role-play, my older stepsister comes home drenched by a sudden downpour. Her dress clings tightly to every curve and her underwear is clearly visible through the wet fabric, making me instantly hard. I cannot stop staring as she towels herself off, and she soon notices my erection. Just when I think I am in trouble, she unexpectedly moves closer and makes it clear that she wants my cock. I know we should stop, but I cannot resist, and we end up having sex.