At breaking point

Lately my mother in law has been making me feel like running away and having this baby by myself far far away. I love my baby’s father, I love our unborn child, and our life is good. But she is so over bearing and toxic. She even went so far as to demand a key to our house. We told her the name of our little one and she said “I really hope you don’t name him that.” She offered to buy us new couches as a gift but wouldn’t buy the one I liked because of... who knows why. I opted to say forget it and I will buy furniture myself. She’s mean. im not catholic but she demands that the baby will be raised Catholic. I don’t want to do that! I know she will soon resent me for not doing things her way and she will try to ruin my relationship with her son because of it. She puts on a perfect show for everyone but it’s not reality. I just literally CANT!!!! I explain to him that his mother grinds every gear in my body but he’s lived with her his whole life so he doesn’t understand, plus he loves her which I understand. But I feel like my patience is so thin that I won’t be able to stay the kind and calm person I am anymore around her. Ok rant over.