I need some advice/direction on a situation at my work place.

There are 4 of us women who take our break times and have lunch together every day--with myself being one of the four. I just found out that one of the other women in our group has been having an affair with one of our outside employees for approximately 3 years. This same guy has been involved with another female employee at our company some years ago. I know this because the other girl told me about it when it was happening.
Anyway, this guy has left his wife. I don't know how long they were married and they didn't have any children. She was battling cancer at one time. So, they are in the process of getting a divorce and now the girl from our lunch group is getting ready to move in with him?????
I know the effects of infidelity first hand and to be honest, all this is making me sick. This girl is my friend though and I have to work with her.
I've tried to tell her that this guy is a serial cheater and that he will do the same thing to her in the future.
What do I do? She isn't listening to me and just gets very defensive if I try to talk to her about it. I know it's none of my business but, it really makes me uncomfortable to be around her especially since she talks to him on the phone while we're all sitting there eating our lunch and I just want to be sick. I have thought about changing my lunch break but I am not sure that I feel that is the best thing to do.
Any advice would be a great help.

One of my personal boundaries for my life, especially after experiencing the pain and betrayal of adultery, is that I am NOT friends with adulterers.

I would do my darndest to find MMW and expose.

I would change my lunch breaks, and let OW know that the reason I can no longer be friends with her is because she is having an affair.

Ditto! I would also add that you should go to the heads of the company and inform them of what is going on now, and what has gone on in the past with this man. He is no company asset, and they deserve to be made aware of his conduct. He is a walking liability.

t/j
Scotty, in regards to my post to you on marksay's thread, I see your point entirely. Mark was really in a win win though. Because of the way he's conducted himself through his personal hell, he could've gone either way on that discussion and come out clean. A natural byproduct of doing things honorably, I suppose. Righteousness does have it's rewards.
[t/j]

Is this really the kind of friend you want in your life? I kind of doubt it, otherwise you wouldn't be here asking for advice on what to do when you've been here long enough to already know what to do.

I would use greater discretion in your choice of friends. She is not friend material. I had a "friend" who did the same thing a few years ago and I let her know I couldn't be her friend anymore.

Thanks all. Yes, I agree with everyone. I did know the answer but I just wanted some feedback. And, you know what the really bad part of this is? This girl has been on the receiving end of infidelity in the past and I'm shocked that she would involve herself in the same thing that she experienced--one of her previous husbands had an affair on her....she's been married 3 times previously.
I am changing my lunch time today....thanks again.

It's not uncommon for a BS in a previous marriage to become a WS in a new one.

She WAS your friend.

Almost every time someone posts a thread like this, it's because they already know what they should do; they just need to hear it from someone else, as well.