Byz offers a man's perspect on this that I think is really valuable. I imagine it would be near impossible to find a new man who could measure up while Mark is kept on a pedistal like he has been up till now. Take care Belle. Snake or not he is clearly slithering around to see what he can snap onto. He seems able to talk a good talk to get your attention but what good is talk if his action speak differently. He was dishonest with you when he took up with Lisa and now he is being dishonest with Lisa and potentially turning you into the other woman. No wonder your mom is done with Mark. This well could be the beginning of the end in a good way for you.

I might be willing to give Mark the benefit of the doubt that he sees the mistake he made leaving you but not before he untangled himself with Lisa. Even then it would be a long uphill road. Turning to you while still engaged to Lisa is not a good sign. He says he did you wrong but he is doing the same thing to her now by turning to you. Perhaps he just says what people want to hear. It seems to work for him.