This is worth reading. I feel I can relate a little better to this than I used to be able to.
Every holiday is a time of balancing all the family pushes and pulls for a child of divorce. No matter what uneasy solution a child arrives at, it does not satisfy everyone, and the child herself is ultimately blamed for causing unhappiness. In this case, ongoing pressure is placed on Heather to warmly embrace the woman who willingly displaced Mom when Dad decided to trade her in for a newer model several years ago. Mom was left bitter and potentially destitute—without even medical insurance; certainly no current skills with which to provide for herself.