Silly question

Sa

How weird is it that my MIL refers to me as “the Mudders” to my baby? I think she’s trying to do an accent but I’m not sure what accent it is. She calls my husband Daddy in front of our kids. I remember her doing it when my first was a baby and thought she was being silly. She stopped after a couple times. Now she’s doing it again and for some reason this time it really annoys me. 😂😂