My boyfriend and I are going on a date with his parents and my parents and my brother and his girl friend

My boyfriends dad and my brother coach my little brother and my boyfriend little brother hockey team my brother being head coach we all know each other but all the sudden they wanna go out with me and my boyfriend. I am nervous because I don’t know what we will talk about and if they bring up sex or my boyfriend and my relationship I don’t know what I’ll say

I am 15 my boyfriend is 16