Ok, while your situation is much more complicated, I think I see what you are getting at. I agree with you that better things could come out of the situation, but the point is is that this woman still feels these feelings about the man's son. Did you ever look at your stepchildren and think the things we think? Many times I have thought about what the little boy in my situation will think of me n 10-15 years. I know that right now he loves me. I do try to tell myself every time I feel that way that it's not fair for me to fell that way because the little boy did not ask to be born, but he was born and he deserves to have parents and to be loved. God knows there are enough deprived, abused children in this world.
Although, I am really on the same page as diamondz because that was when my feelings really started to change about my own situation, was when he went to family justice and got a proper court order and set clear concise boundaries with his ex. He no longer accepted comments like " you are a bad father" and started respecting my feelings more on what I felt she was trying to do to our relationship. He began to include me more on decisions and I think that if you will ever have a truly successfull relationship with a man who has childern with someone else, there absoultely has to be clear cut boundaries with that ex and you need to know that you are going to be potentially parenting this child and they need to parent WITH you. He chose to be with you, not her and while they can ultimately have like conversations about attempting to be consistent with their child...word of warning....in my situation the ex purposely tried to be inconsistent to what we tried to do to create drama. The next ste we have taken is that when his son comes over here it is our rules and our time. We don't care what his mother does with him and what is expected of him at our house is expected of him.If we believe there is a problem with him or anything else, we will deal with it and leave her out of it. It's only because she has been so ridiculous that we eve had to do that in the first place.
Anyways, now that I'm reading and thinking a bit more, I do believe that it has A LOT to do with how well your husband deals with her and what boundaries he has set up and hwo much control and say you have over what happens in your own life with this child around.