Update:
Things are going well. I haven't been answering her calls and only responding with short messages. It drives her nuts and she flips out. She then demands that I answer when she calls or she said she would stop calling. I do not get angry back but play it off as being busy or my phone was on silent.

She is becoming depressed somewhat with knowing the affair is coming to an end and not being able to carry on like she did before. To continue will mean more exposure, possibly losing her job, and heartache for destroying 2 families. We live in a small community so it will spread like wildfire once it gets out. It has been pretty well contained as the OM's wife hasn't really told anyone and she has kicked him out of the house.

I know that all her feelings of guilt and shame are short lived due to working with him everyday. She will continue this roller-coaster of emotions for a long time.

Keeping our talks short and avoiding to talk about OM and his family. I try to change subject or walk away when she shares feelings she has for him. His wife tried to call her again last night and she didn't speak to her. She quickly began trying to emotionally connect with me and became needy to some degree.

I just told her she needed to speak with the woman and give her the truth. Avoiding the woman implies that she is still involved with her husband. It is a big mess. Her world is slowly crashing down and she finally admitted last night that she is going to try and stop the affair. We were in the car so I couldn't avoid her talking about the situation but it's the first time I've seen her show some remorse and rational thought about the situation.

I am not gullible enough to think this has stopped or will stop. I know that she has called him at his new home. She hasn't been to work out in the past 5 days. She mentioned going at night and I just told her to be careful because the OM's wife said she was hiring a private investigator. She quickly changed her mind about working out at night. It's almost comical how any sort of pain or further exposure will quickly turn her away from him to some degree.

I know that it is short lived and she will be back to communicating with him when she goes to work during the day.