Step Families Support Group
Traditionally, a stepfamily is the family one acquires when a parent enters a new marriage, whether the parent was widowed or divorced. This community is focused on many of the relationships and issues that may arise within stepfamilies where you may find answers from some members and you may help other members with their questions.
I'm roughly the same age and am dealing with the opposite issue. My father's wife gets wildly upset if he does anything for me or my kids including telling me that I couldn't live with them when my ex-MIL put us out. He has to sneak and talk to my daughter if she's at my mom's house (which is almost always).
I figure it's the same thing. She has some issues about her kids fathers and it's my problem by default.
On another note...the dynamics of women are so complicated!!! What I’ve learned is, if your relationship has flaws. Or...the daughter or wife is feeling rejected. We have a tendency to forget that it is a father / daughter, husband / wife relationship and subconsciously start looking at them as “the other woman” that we are competing with for one mans attention. That then causes an immense amount of jealousy, resentment and hate!