I’m stressed as hell and no one helps

I posted before. We have my nephew right now as my MIL, BIL, and SIL, habe a trashy house and got dfs called. They have until tomorrow to clean it. After making a scene the whole time we decided what would be done for the baby’s safety my SIL hasn’t given one fuck about cleaning so he can come home and has actually given me chores to do for him. Like wean him into just formula. And I mean, I can do it and I have no choice because she stopped pumping (after being warned about mastitis. She’s dumb) but their child is I think having nicotine withdrawals and is fussy ALL THE TIME. I’m so tired. I have him and my daughter and she’s jealous and acting up and he cries all the time. My husband won’t help because it’s “not his kid” he’s not my kid either!!!! He’s not even my blood relative. My MIL came over and helped last night but god she makes so many excuses for her son and his stupid wife. He’s planning on divorcing her and kicking her out and going for custody but from the way he came over here and the fact that ALL of his clothes and belongings were coated in dog piss and some had shit, I don’t think they should have him. We vouched for them for the sake of my MIL but she lives with them and allowed this to happen and allowed a drug addict to pump milk for this child. And then let my daughter have some but that’s a different story. She’s just as guilty and I’m starting to resent her too. And my husband. I’m just fucking tired and stressed and anxious. I want him to go somewhere safe. Someone who can better take care of a withdrawing FAS baby than I can. 😓