Bitchy sister n law

Okay so here's the thing, she has a kid so when he's sleeping She likes to tell us to be quiet and that's fine we understand but when she's having a full blown physical argument with her baby daddy at 10am while everyone is sleeping (my husband works night shift so sleeps throughout the day) I texted her in a very polite manner and asked her to lower it down since her brother was sleeping and worked later on she completely blew everything out of proportion and even threatened to beat my ass Lol and yes I laughed about it 😂 so here's the catch, should I stay and deal with their bullshit since I am with my husband and not her or should I move out on my own? My husband wants to just keep staying there while I don't want to live somewhere where I'm not even comfortable at. What exactly is there to do? I'm really fed up and I refuse to keep letting her talk to me this way.