Her Live was saved on FB. She starts talking about it around the 9 minute mark, I think.
"...I think the other thing is, when you know you have issues and you know you have problems, whether it be on your side or another side, when you start looking before you're separated, that is hard. When you become involved and much more than just a friend, that you become maybe more in a relationship that's more than just saying, "Hey friend, let's go out for coffee," I think that can be hard on the other person as well, and I think that's what happened in my case. You know, we have someone that worked for us for a very long time, on our farm, and I believe (this is all from my perspective), that there was more than just friends going on and I think that evolved to a point where that got in the way of our marriage as well."
She then goes on to explain past TV scenes where she maybe appeared to be taking things out on Matt, and said that it's not because she didn't want him to have a new relationship, but was more upset at how it began and developed, and says that because of that, the show had her come across as being angry and bitter, and says she admits that it was very hard, and was and remains a process to get over.