Oh great, so your mother in law is used to being beaten to shit, smokes alot, and probably dresses "fashionably" like a vegas street hooker (I repeat myself) in black latex. She also likes to pretend she's from Beijing and then gets verbally curbstomped by a proper Beijing local.
Your father in law is probably does some housework, but likes going out with his guy friends (like a mean girls episode) daily to drink, play mahjong, party, and bang KTV whores with cash. Hope he didn't get into it with an underaged girl and then get blackmailed.