Brother-in-law shamelessly exploits situation

I want to have a hot 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 can't wait to see how he reacts. The doorbell rings... "Come in," I call out ambiguously and he doesn't take long to answer. I can feel how horny it makes him - his cock 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 Oskar grins cheekily at me - this lecher is shamelessly taking advantage of the situation! Unbelievable... But it was cool...