i dont get my parents!!

my and my current boyfriend have been together for a little over a year now. for my birthday, he got us tickets to see “Beauty and The Beast” live which is my favorite movie. my mom told me that i can not go to it because she does not want him driving me into the city, so i talked to my boyfriend and he said that his parents would drive us then and my mom still said no because it would cause problems!!!! why would that cause problems. i dont get parents sometimes, yall.