Might be copium but I think she's testing him. This seems way to overt for her not to be. I still think she's using those two as material. I think she'll drop him off he accepts, thinking he's unworthy to be in a workplace drama.
If the MC fucking agreed to this, I hope they get a divorce or the wife cheated on him. There is no fucking saving grace if the husband is so braindead he agreed to that
She already figured out who the wife was from their surname, and they are friends, and he already said to spend his time at home with his wife, there's no point for you guys to even overreact.