AITASwipe

In-laws are visiting and they're driving me insane. FIL refuses to do anything himself. Literally whine-screams from the guest room, "I'M! HUN!GRY!" and expects MIL to fix him a plate at any hour. He's refused every outing and bonding experience we've tried to make. I got tired of hearing him scream at her from behind closed doors. This time I heard him say, "No, move that over there. No, put it there. You're so fucking stupid, (MIL's name)!" He's so used to getting his way and I have HAD IT with his attitude. He's used to throwing his weight around because he's tall and loud. But now he's too old to be loud and he went full Hank-Hill-ass anyway because he almost never gets out of bed (by choice, not because of being disabled, he's just lazy) So I stormed in and yelled at him that he does not treat his wife like this in my house. He tried to say it wasn't my business, but it is my business whenever I can hear it because I'm half-deaf, so it takes a lot. He tried to say they've been married for 50 years and "we work it out our own way" and I said, "well you're in my house so its my way or the highway. You do not talk to the person you love like that in my fking house!" I was full banshee-screeching at him and frequently over him as he struggled and stumbled with excuses. He'd say shit like he "didn't say anything wrong" - "yes you did, you called her mean names. A good man doesn't call his wife names!" He said "she WAS being stupid so (he) HAD to" -, "no, you made a choice, the WRONG CHOICE IN MY FKING HOUSE!" He would backtrack and lie. So I asked, "did you or did you not call her stupid?" he went off on another ramble about how long they've been married, so I screamed over him, "YES! OR! NO!" Until he finally admitted yes. I told him that he needed to apologize to her. He said he would "Talk to her" privately. I refused and said I needed to hear it because I know behind closed doors he's going to continue disrespecting her. He called me a bitch. I told him that if he wants to have a relationship where we all cuss and hurl names at eachother, then he's a fucking pussy who can't man up to his own actions when he's in the wrong. My wife got home and broke it up, then she took a turn screaming vs him too (because she did not like that he called me a bitch for refusing to back down against him). My wife and I sat down with MIL. We told her that if she doesn't actively make steps towards getting home healthcare for FIL that I will be calling APS, assuming adult custodianship of both of them, and sending them to separate care homes. We gave her the choice of whether to divorce or not, but we made it clear we expect her to stop taking care of him herself. AITA for screaming at my FIL for 30 minutes and threatening to take custody of both of them?