Considering how much they'd been drinking, I'm not surprised they had the idea to have a threesome. Especially since the mom is such a badass. Kissing your daughter in front of her boyfriend meant offering yourself up as a pussy for copulation. And the guy took advantage of that offer by banging both of them. He even shared his sperm with his mother when he came between his girlfriend's legs. Damn, that's fair!
Specific masseuse, who knows how to perfectly massage the cock, all parts of the body, but has no idea what to do with the rest of the body. Although, maybe that's the main skill in massage?