stepbrother shows his stepsister his cock in the bathroom and she craves for a taste of it

I'm taking a bath when my stepbrother comes in and wants to get in quickly because he's in a hurry so I tell him no but he's very insistent he comes in and stares at me but I ignore him so to annoy me he steals my towel, surprise for me that when I went to get it his cock was hard and I couldn't help but ride it until I made him cum.