Rob,
Well, your description of you XIL explained much of your XW's behavior. They sound like they make like everything is fine and never look too deep. If they wouldn't say anything to their daughter about bringing home an Om so soon, it explains why your XW did not at least try to work harder to save the M, at least because of her D. No matter what the inlaws think of you, you are the father of their grandchild, just remember that. One would think, they would be worried for their grandchild and at least tell your XW, to be absolutely sure he is "the one" before bringing him home. Do these people ever think of the effect on a little girl to see her Mom go from one man to another and her grandparents accept it? I am sure you will relationships with women , but will not involve D until you are sure. One day when your D is older she may run from her Mom to you. Your XW should be busy making D feel she is number one in her life. I happen to be friends with a young single Mother and she has dated for many years, She has now met a man , who is"the one". He is the first man her son has ever met.This seems to make more sense, especially with young children.