<human>: Can you provide a brief overview of the text?

Recently I went to a Harlem Globetrotters game and as I was walking with my girlfriend and her little brother and I said something really stupid... Her little brother was well talking about the size of my balls and he's just a perverted 7th grader. He was just saying who's balls were bigger and ya know the usual stuff 7th graders say. Well me being stupid I said "You know who's balls are bigger man? KELSEYS" (which is my girlfriend) then he looked all confused and said "I'm telling mom" and now ever since her parents hate me just for that tiny little remark. I feel stupid for saying that and I should really have a filter for what I say and just sometimes I don't and I messed up here. And her parents hate the shit out of me at the moment and my girlfriend keeps telling me not to apologize because it will make things worse so what should I do?
<bot>: Said stupid remark to girlfriends perverted little brother, little brother told her parents and now they hate the shit out of me, what's the best way to apologize even though my girlfriend doesn't want me to apologize?