Baby talk is annoying me

So I baby talk with my dogs because I like their reactions. I never baby talked to babies because I guess I just know they don't know what I'm saying and there's no point to me especially if they're supposed to know the sound of my voice when they're born and I didn't go around talking baby talk all the time so..

But my mother is baby talking to my newborn and it is driving me crazy. And she repeats phrases 500x in a row and I'm about to go nuts. He had only one sock on because he lost the other one somewhere just now and she repeated "where's my sock?" In a baby voice over and over and over and over and over and I'm going to scream.