Husband’s best friend’s wife eye-f*cks my husband…

I’m not exactly sure when or why it began but I’m trying not to overreact and looking for some thoughts on this.

So the friend and wife aren’t meant for one another but ended up tying the knot and are now cheating on one another but decided they’d keep their family together while still having an open relationship.

The wife used to never even try to talk to me— almost as if she felt she was too pretty or cool to talk to me. Well, recently she’s been being super extra, asking if I’ll be coming when there’s an event or get together when my husband and I get invited. I’ve also noticed she always seems to try and get my husband’s attention and picks on him in a flirtatious way and it’s been obvious to me, but to my husband, not so much.

I’ve expressed to my husband how i feel about the situation and how i know what she’s doing and if he doesn’t say something to her, i will. He feels as is I’m looking into something that isn’t there and he doesn’t want to start anything, although his friend said himself that his wife has been super friendly to his other friends and dressing more provocative lately.

Last night, the friend started bringing me drinks as soon as he saw mine was empty and was almost trying to do the same thing his wife has been doing with my husband. I talk to my husband about this and he just says it didn’t bother him bc he knows neither one of us would act on it, and while he’s right- i would never cross that boundary, but some part of me felt bothered bc even though I trust he wouldn’t cross that boundary with the wife either, it’s still blatantly disrespectful to eye f*ck my husband in front of me and your own fxcking husband, and then my husband almost acting like he enjoys the attention.

Apart from this, he feels it’s necessary to always tell me when someone hits on him or checks him out as is he wants me to get jealous?

IMO, the best thing our marriage would be to remove this toxic couple from our lives but some part of me feels he would still sneak to go see this friend behind my back.

I’m not sure what type of response I’m looking for, but I’m just looking for some advice or thoughts on what you all think about this. Besides file for divorce, how would you handle this?