Making_IT, I know I keep saying this, but it feels like deja vu. I remember being where you are. Sounds like you turned the corner. I'm happy that you have some peace of mind. In light of what your W said about not deciding your M was over I wouldn't be surprised if she came back in a while and asked you to give her and the M another chance. Once the LBS shows that s/he is really done and moving on the WAS is hit with reality and often realizes what s/he is losing and reconsiders.
Most people will tell you to keep an open mind if/when this happens. I know that I never thought I would let xBF back into my life because I didn't want to risk being that hurt again and I never thought I could forgive him. Well, here we are trying to reconcile.
But if the desire for children is an issue, I want to come down firmly on the side of not compromising. As a person who is childfree by choice, I feel very strongly about this topic. It is better to know now that you want to have a family and your W does not. There is nothing wrong with either choice but you are fundamentally not compatible.
I'm sorry it's come to this for the two of you. Please know that we are still here for you.
If you love somebody, set them free. http://tinyurl.com/2empx2g