Lol. I guess that works till it doesn't.
Back in grade school some.boy had a crush on my daughter and tried this tactic with her too. Mom jokes. "You're Mama's so fat...." jokes. I'd let her wear her Sunday shoes to school because she was outgrowing them; they were one of those little heeled sandals with rhinestones on them. You know the ones?
Anyway, he might have been better off to have earned her that such things were jokes because we don't joke like that, having a firmer grasp on on what is actually funny and what is bullying and hateful misogyny.
Anyway, she took off her shoe and hurled it at that boy. Got him right in the forehead and knocked him down. He got a new nickname. Tilt. She got a reputation for having wicked aim. And nobody told fat Mama "jokes" to my Urchling any more, even after she came home with a note from the teacher all full or righteous indignation about it only to find out that it was supposed to be a joke but boys don't understand the difference between funny and mean.