I HATE the “baby talk”

Sooo pretty much my mom will sit there and talk to me son all day so loud and she will downtalk me. “oh mommy didn’t do this” “mommy didn’t do that” “did mommy feed you” “i’m your favorite not mommy” and i’m so sick of it. maybe i’m over reacting but sometimes it gets me so mad I want to say something but i don’t want to get rude. I just hate it i want my son to always be spoken to like an adult.