Mil bought us a house ?

So to make this short, I’ve been together with my boyfriend for 4 years and about 3 years ago he moved out of his mothers house to move in with me at my house with my parents. He doesn’t really have a good relationship with his mother so he wanted to move out. Of course his mom didn’t like that and kept trying to convince him to stay at her house. He’s 30 which is think he is old enough to make his own decisions. We were saving money to move out soon but then I got pregnant last year and our baby is now 5 months old. His mother lives 40 min away from my house. We don’t really go over( maybe once a month) because my man and I don’t like how she acts sometimes. She judges how many times I feed my baby, says that the reason my baby was premature is because I did drugs while pregnant etc. Just ignorant comments like that. Anyways she gets mad at my boyfriend when we don’t visit as often and for the past couple months she’s been bugging him about moving closer to her or even moving in with her which my bf and I completely disagree. Sooo, just yesterday his mom sent him a text saying that she bought a house for him that meets right in the middle between where we stay now and her house. So it’s like a 20 min drive for her now. He’s going to Call her later today to talk about all this.

But idk how to feel. My bf and I are so upset the fact that she did this and my bf thinks she just wants us to live there so later on she can throw it in our faces and be like “ I bought you this house , you owe me, let me see the baby”. My bf is going to tell her that we ARE NOT moving in that house whatsoever. Is she kinda doing too much or am I just tripping??? I’m just so mad 😡