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 likes to make other men unfaithful to their partners. Uncle gets the piece of ass that has the slut and her good breasts horny, so when his girlfriend falls asleep, relaxes is not very opposed to the prostitute eating his cock. So 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 down. He thinks since he was caught at least he's still fucked in the ass.