Monster in law... help please!!!

Let me start by saying I am a young mom and my boyfriend is young also. My boyfriends mom was a young mom as well, except she had 3 boys, each two years apart, and the first 2 she left for her mom to raise and the 3rd, my boyfriend, she left for her aunt and uncle to raise. 8 years later she puts up a huge fight and there was a custody battle for him, where his mom won. Now of course since I’m living with her and have been for months, I appreciate her and all her help she’s given throughout my pregnancy, however things have only gone downhill. I don’t know what it is but from the second she met my daughter she made it seem like she expected me to drop all my responsibilities as a mother onto her, which I have not done in any way shape or form. It seems to me like she thinks that I’m going to do the same thing she did, and just let her raise my daughter while I continue to act like a child, which is absurd. Anything my boyfriend or I ask of her when it comes to our daughter she has NO respect for and tells us why its fine that she does something we’ve asked her not to. By my second day home from the hospital I had heard her slip and call herself MOMMY to my daughter multiple times, it turned my stomach. Any chance she gets she criticizes me. My parents have came by a few times to see the baby and the second time my mom offered to help get stuff done in the nursery, since it still isn’t finished, and once his mom saw us in there she asked me what the problem was, as if i’m not allowed in my daughters nursery? When I told her that we were organizing and stuff she said how she was going to do it, but it would make no sense for her to do it because I wouldnt know where anything was making my daughters room hard for me to navigate, which me and her had already discussed.

Since only a few months into my pregnancy she said how nobody would be allowed to smoke in the house once June came since the baby’s due date was June 17. Ironic thing is, she never stopped herself, even when the baby came! The whole house reeks like cigarettes and she doesn’t clean anything, and her finished basement where my boyfriends 2 brothers lived is packed with things that she refuses to get rid of, mostly things that are broken or wont ever be used. She hasn’t swept her own floors as long as I can remember, my boyfriend always takes it upon himself to do it once he notices how gross it looks.

My boyfriend, the baby, and I have been at his aunts house since wednesday because it was his birthday and we plan on staying the week because he has family visiting, and today my boyfriend went home to get a couple things we will need for the week and his mom starts asking a million questions saying how we’re coming home tomorrow because she HAS to see the baby.

The whole situation has me sick and I don’t want to bring my baby back into that house at all, but I have no other options... I make no money myself and my boyfriend makes decent money but she wont allow him to move out until he’s 18 (to make it hard for

me to leave with the baby) and if I try to leave she will do everything in her power to make it impossible for me. Someone help please. I only want the best for my baby and that house does and that woman is not even close to what my daughter deserves.