[46M] Do couples tell each other everything?

The thought never occurred to me until one day I was having a meeting a couple for brunch. I’m friends with one of the guys and he always extends the invite to his partner. I have no problem with that.

But his partner brought up a story about a hookup that I had told my friend. I wasn’t embarrassed or anything about it, but I realized I should gatekeep what I tell my friend. And actually kinda bummed about it because I can’t be as open with him and have to think if he’ll share everything with his partner.

I guess the question is do you expect that your friend will share everything with their partner or expect that they will keep things just between you and them?

I’m debating whether to bring it up, or move on and accept it as standard expectations of having a friend who is coupled up.