Hubs coworker msging him for “advice”

La

So my husband used to work with this female and her hubs.. well she cheated on her hubs and admitted it to him that she cheated and now her hubs is cheating on her in return to get even I suppose.

Anyway for whatever reason this chick has felt the need to private msg my hubs on fb to talk about her “marital problems”, now mind you this has been going on for at least the past year and she of course only talks about leaving him.. so today she msgd him when we were together and I had finally had it. I grabbed his phone and I wrote her back saying “don’t you have any gfs to talk to? Quit msging my hubs about her marital problems because you’re obviously never going to leave him.” She msgd back “ok..” then says “umm I talk to “nickname that my hubs goes by that I don’t even call him” bc he has seen things and gives me his opinions on shit lol”

So my question is what would you women do in my place because I’m pretty irked?

And just to add to it my hubs jumps all over me if I get any kind of msgs from anyone or is constantly acting like I’m out here messing around.