Back on topic, I am the DD who had a problem with her mom, or rather my M was an MIL from you know where. She expected to be right in the middle of my M. She felt entitled to know about our sex life, our arguments, and our finances. She thought we should do exactly what she told us to do regarding our children. She expected me to call her every day, and for us to be at dinner every Sunday. She expected each of us to confide in her about the other person. She expected to go on our vacations, on our date nights, and on any trip we took even if it was to a local big box store.
When I insisted on healthy boundaries, she blamed DH. Nothing he could do was right. She complained to my siblings who reamed me out. She made up stories, or took our words or actions out of context to make herself look like a victim. She used my children to get to me. She undermined me as a parent and did her best to poison my children against DH (we are a blended family). In my first marriage, she actually insisted I choose between her and my then H, and I could tell she was going to try the same trick with DH even though it didn't work the first time. I headed her off and made sure she knew my loyalty with with my DH. So, she made all of the rest of the family, including my children, choose between me and her.
The result is that she is cut out of my life. She thinks it is all because of DH, but I think it would have come to this even if he weren't around. She was partially responsible for the break up of my first marriage and I learned from that experience that if I wanted a healthy marriage, I needed to set healthy boundaries with my Mom. Since she cannot handle boundaries of any sort, it was inevitable that we would have problems.
Growing up, I felt like I had a bucket of emotions inside that always had to be available to my mother to stir up or dip into as she needed. I had no control over it at all. As I grew up, I learned how to deflect her overwhelming emotional needs somewhat. As an adult, I refused to be responsible for her emotional needs. I expected her to put on her big girl pants and learn how to deal with them herself. This is were the real problem was, I took control of when I would be emotionally available to her. She couldn't use me anymore.