Husband wants his best friends wife...

So we're vacationing with another married couple for a week. The guy and my husband have been friends since they were kids. This entire week my husband been a dick to me, making fun of me in games n every time I mess up anything. Like if I trip he doesn't just laugh but he throws it in my face at every opportunity. This entire week my husband has also been complimenting his bfs wife non stop, defending her every time her husband picks on her. And this woman is defending my husband when I stand up for myself after he keeps picking on me. When we play games they somehow keep picking each other or helping each other win. They are never alone together so I know nothing has happened, but I'm worrying now that something might. That maybe he has the hots for her. She has mentioned in the past that she thought my husband was very attractive. What do I do about this? Am I overreacting?