Boy/girl movement mil saying

Karen

So we just told my mother in law that we're expecting and she asked me if I already felt the baby move, (I'm only 14 weeks) I told her maybe she said than that it was a boy since girls only sit like a ball of meat until they're born. She kind of pissed me off because of the way she said it since she and the rest of her family have been telling us to hurry up and have a girl.

Would anybody think or say it's true though?