My issue with this is that my cousin would tell her son that...at 7. His voice hasn't even changed yet, but she would yell at him for talking "like a baby". He's a little boy!!! When she would do that I would hold my tongue because its not my place to tell her how to raise her son. But, I will admit that some of the things she does, is going to cause issues between them later.

I would say when he's in his teen years.