Baby mama drama

So my soon to be ex SO who is also the father of my unborn child has a baby mother from hell who is very controlling and says bad things about me and the relationship. She says how he needs to go get a blood test done cause the baby is not his and to have me get an abortion. He says nothing in return to stand up for me or the baby. It's obvious he still has feelings for her by his actions and negligence to put her in her place. She just had a baby with another guy is supposed seeing him now but she will not stop with the harassment or constant shit talking to him about his decisions. He says nothing about what or who she's doing that I know of. So my question is should I take me and my baby and move out of town and let him deal with his already life long drama? I don't want any part in her crazy mind games and guilt trips, They have two kids together and she wants him to have no part in my child's life. He says all his kids are equal and he would treat ours no different but She's like the little birdie in his ear filling his head with toxic shit and he won't do anything to stop it! He's very weak minded as well. I hate I ever got involved with this mess!!😒