Feel jealous over DH laughing and joking with his female coworker in our home

[ThatFunRubyHelper]

DH needs to work with coworkers to practice for an exam as part of his job. He has recently been going to a female coworkers home to do so. I should note she has a partner who he says is usually there. He goes to their house every weekend for a few hours.

She came over today and it was clear to see that they are quite comfortable with eachother. I stayed with them for a while then left the room. They were laughing, joking, spent a lot of time not talking about work.

I was ok with this, up until my husband opened the door for her to leave and joked something to her again and laughed. This really got me jealous and I tried hard not to look annoyed.

It's especially annoying because he doesn't want me to have male friends, and if I was being that jokey and friendly with another man he'd be annoyed.

I suppose there's nothing I could do but just wanted this off my chest.😣

The only thing in this that would worry me is that he doesn't want you to have male friends.... That is a major problem.

Did they include you in the conversation while you were in the room OP? Or did you feel like the third wheel?
It definitely sounds as though their relationship has morphed from co workers to friends. The problem is if their relationship develops into more than that. It sounds as though there could be a danger of them moving into emotional affair territory if they continue to get closer.
I think you need to talk to your DH about boundaries.

His behaviour with her is fine. Men and women can be friends and joke around.

However his behaviour with you, namely not wanting you to have male friends is a HUGE problem. Is he controlling in other ways too, OP?