Anal sex in the sauna with a good slut in exchange for being unfaithful

When this guy and his girlfriend arrive at the sauna they find a good slut who enjoys getting other men to be unfaithful to their partners. The uncle gets the piece of ass that has the slut and his good tits horny, so when his girlfriend falls asleep relaxing does not oppose too much that the whore eats his cock. Then he offers anal sex in the sauna in exchange for him being unfaithful right there, which causes the bride to wake up and hunt them doing it. He thinks that since he has been caught at least he is still fucked in the ass.