Approach her about what? "Talking" to another man?
Unless and until you have definitive proof that she's having either an emotional affair (EA) or a physical affair (PA) I would NOT bring it up. There's a good chance this IS an EA, but it doesn't sound like you have any proof? Have you seen/heard the content of their conversations?
I read your previous thread. It sounds like you've tried the "Mr. Nice Guy" approach with the bubble-baths and all, and supplicating her. I suggest you try a different approach, especially now that you know this new information.
