Overreacting?

Would it piss you off if every fight you and your bf bad he runs to your mother and tells her? I’m irritated because it’s EVERY single argument that we have he runs to my mom. And she coddles him and makes me out to be the villain and then me and my mom end up on weird/awkward terms. I constantly let him know he is causing tension between me and her and I have talked to him about it time and time again and he has claimed he would stop. But has not AT ALL. I’m tired of it smfh.