Let's put it this way. Every man deserves the woman he has. In this case, the husband is a slacker. The wife brought the fucker and instead of immediately kicking the wife and lover out of the house, he just said a few phrases of objection that had no weight among those two. An even greater humiliation was when, after his wife had been fucked, they took and splattered cum on the husband's face and he again bitch-slapped.
It's the ass that seems to attract the guy the most. Once he's tried it, he won't want to deny himself anal pleasure anymore. A girl has a chance to offer him MJM to fill both holes. And if you offer it to a guy during sex, he'll agree to anything. I'd love to hold on to those little tits and cum on them.
I'd get my ass in that one, too! After all, a Japanese couple records their sex for a reason, but for their friends. So they can cum on his wife too.