Your situation sounds very promising, you may not be asking for advice, however if you were all I could say is take it slow, build your communication skills and trust.
Mothers are very protective, especially of their sons. Your x has violated her trust and hurt her son. I understand her reluctance, but if your x is true the trust will come back.
I know I have depended on my Mom alot. She would love to see us back together. However, she does not trust her and she routinely gets frustrated with her actions. So I kinda know where your coming from.
Do you know why she had the feeling that the R was dooomed?
