My sire brought home his boyfriend(s) more than once. I don't despise him for preferring guys (bi-to-gay, I'd place him; he had four kids, after all). I despise him because he promised monogamy, he promised respect, he promised love, and he was a filthy liar, emotionally abusive, and sometimes physically abusive to my mom.

Makes me wish I was the mailman's, but no, my mom swears not. Dammit.

Despite that... Maybe even because of it? (Some of the gay guys he brought home -- either as lovers or eye-candy, I honestly don't know -- were actually pretty sweet guys. Only one of them, I think, was actually aware that my sire was not engaging in permitted polyamory but was instead perpetrating non-consensual adultery. And that one was a jerk for going along with it.) Anyway, I'm actually all for same-sex marriage. Homosexual doesn't equal slime. Slime equals slime, and homosexuality is no protection against someone just being a jerk, same as any other human.

Got no clue if that'd actually help you. But you're not alone. (I danced when my mom filed for divorce.)