My Mom and I had a rocky relationship. I was really close to my Dad and I was very independent. She couldn’t control me and I never sought her advice. We were oil and water. I always chalked it up to her having a bad childhood.
Oddly enough I was the sibling who ended up taking care of her in her old age until she passed 2 years ago.
That's not odd at all. That's usually what happens. The favorite daughter never had to work hard to get her mother's affection. The non-favorite daughter is there for the mother, still working for that affection years later.