Surprisingly fucked by a stranger

This guy has a special surprise for his pretty girlfriend. He offers her to play a game where she gets tied and blindfolded and he fucks her like that, but in fact it's another guy who starts fucking her. By the time the two pervs let her see what's really going on she is too horny to stop and her boyfriend gets what he wants watching this slut get fucked hard and take a facial from a total stranger. He always knew she was a slut and here's proof.