I've rather enjoy that show.
Here's my take on it. I rather like how she made the point that "Yeah, I was/am a workaholic and it wasn't fair to you, but that didn't give you the right to cheat on me."
But I also like how they got divorced over it, and that he has been making attempts to make amends. I like that it isn't perfect. I like that he still got a bit uncomfortable about it. I also like that she challenged him a bit on it.
It seems so much more real to me than what so many other shows would do, which is just have them fall into bed and be all "I always loved you and all is forgiven."
It was tough to watch, but at least there was some realness to it.