My boyfriends youngest daughter thinks it's funny or cute to call him by his real name. Or when she…

My boyfriends youngest daughter thinks it's funny or cute to call him by his real name. Or when she is mad at him. And she does it a lot. And he doesn't always tell her not too. When I did that when I was young my parents got pissed off. And I learned quick not to do it. I just think it's disrespectful, she's 7 she should call him Dad or daddy at all times. This man goes above and beyond for her and her sister the least she could do is not call him by his first name when it's her father.