what is the best advice to give to a friend?

I have a friend who recently seperated from her husband of 11 years and the man that she has been seeing has been divorced for a little over a year. Recently she came to me and asked a question that I have no answer for so any help would be appreciated. The question is what would you do if after only being seperated for a short period of time this guy states that he may be ready to stop playing the game and be ready for a relationship? It freaked her right out and knowing that he has been what I call a manwhore she wonders on how to process the information that has been given and honestly how to interpret it and I cannot find the answer so anyone out there with some advice on how to help my friend would be greatly appreciated