Totally shamelessly used by horny brother in law

I want to have a horny evening with my lover and then something like this - I style myself for a hot role play, get into position and wait for him. I know he likes that and I'm curious to see how he reacts. The doorbell rings... "Come in," I call ambiguously and he doesn't wait long. I feel how horny it makes him - his strap hasn't been this hard for a long time. Bull's eye!!! He takes me from behind and jerks off inside me.... Horny, I think to myself, take off the blindfold and... Instead of him, my brother-in-law grins cheekily at me - this lecher shamelessly takes advantage of the situation! Unbelievable... But it was cool...