Letting my step-brother dry hump me to get back at my boyfriend

My step-brother has always been obsessed with my leg.. He comes into my room to talk to me and can’t help but ask if he can sit on my lap.. I tell him no, and then he fills me in that my boyfriend is currently on a date with some slut.. I decide to get revenge, and let my step-brother dry hump me as long as hard as he wants until he cums all over me… While I tell him all about it on the phone.