I have always been attracted to oriental women, especially Japanese women. I have read books about geishas and other traditions, maybe that is why they do not go out of my mind.
In fact, the Japanese sex culture is very different from the Slavic and European. Maybe that's what attracts them.
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!
Sister sucked her brother's dick, as she got very horny and decided to spend her time doing something more useful than watching TV.