Would i be in the wrong if i didn’t continue having a relationship with my MIL?

For context, I am a 20F and my fiancé is a 21M. We’ve been together for 6 years and once we were both 18 we moved 4 hours from home to the other side of the state for college. When we were in school, we had a friend in our group that was a reseller. He got us into the business, and we’ve been doing it for almost 3 years now. We blew up on social media platforms rather quickly and we make a lot of money from 4 different streams of revenue. I never had a problem with my MIL, she was always nice to me. I even saw her as a friend I could confide in, and she would do the same. Parents make me a little bit uncomfortable because I had a horrible relationship with my own. She has been the only parental figure in my life since I was 18. Recently, our lease for our apartment ended and we hadn’t found a house yet, so she offered for us to stay with her until we find a house and close on it. She is a real estate agent so she wants to be able to help us find our own place, I never had a problem with it and was very grateful that she was so supportive and helpful during the stressful process.

I’m going to list out particular situations on a different post and will link this to the other post for the sake of the character count.

• my fiancé paid for one month of her mortgage to be nice and now she expects it every single month and cries if she doesn’t get it.
• she expects us to pay for all groceries and gets mad if i decide not to cook dinner one night. angrily goes into the kitchen and bangs things around cooking for herself while muttering under her breath.

• recently she has been asking my fiancé for money to go get her nails done. I told her jokingly that I don’t even get my nails done so my fiancé probably won’t give her the money and wished her luck. She told me that she’s not “just a girlfriend” and that she’s his mother so she’ll have no problem getting the money and thanked me “for my concern” (I’m not just a girlfriend either but I kept my mouth shut)

• Whenever my fiancé buys me something, my MIL has to have something better and begs my fiancé to take her shopping.

• i’ve told her multiple times to not let my dog out of her crate in the middle of the night because we have a very expensive Off White rug that she likes to poop on and we can’t monitor her while we’re sleeping. She does it anyway and then laughs when she sees poop on it “oh well it looks like grass, maybe you shouldn’t have bought it”

• I got this thing off Amazon that picks up per hair very well, and I use it on my bed and my expensive rugs. My MIL used it to keep up cat pee and baking soda, and when I told her to please not use it for that purpose she went to my fiancé and cried how I was being mean and how the device was “purchased for her, so i shouldn’t be using it anyway”

• She has straight up told me that she leaves her dirty dishes on the counter for me to wash “to see if i would even do them” and thinks she shouldn’t have to wash her own things since I’m going to be washing my own anyway. I finally told her that was a very toxic thing to do and she needs to stop playing mind games. She started crying and told my fiancé that I was being mean to her. I admit that maybe I should’ve worded it better, but wtf lol.

• We are waiting to close on a house that is 2 hours away from her and she calls me names and tells me that i’m “taking her son away from her”

There’s tons of other instances where she has acted like this, and I’ll update as I think of more, but these are the main things that I have problems with. It’s just so INFURIATING i don’t know what to do anymore.