My partner doesn’t do it much but his brother is always making jokes about what he is going to do to his girlfriend later on in front of his parents. They find it funny and will often make remarks themselves.
Eg remarks like “he might be in for a good time later” bj related remarks, telling their son to make sure he takes his socks off… there are many more I can’t quite remember.
They will try and do it to me but I don’t really laugh, I just don’t find jokes about me and their sons sex life funny, I’m 40 years old!
Is this normal behaviour, I’ve not experienced it before in relationships. They are obviously open minded but I can tell the girlfriend feels awkward.