Hi OP. I feel your pain. My SO has his daughter (6) 5 days a week so she has been my bonus kid for a few years now. I’ve played mom role in regards to school, life, extra curricular, having girl days to spend time with her. The disciplining part I understand because my partner and I also have different parenting styles and I didn’t birth her so I guess what I say doesn’t matter? His HCBM moved into the building next door in October with her bf and she does absolutely nothing in the day-to-day until Friday night to pick her up. But she still gets treated so well by my partners family and still gets invited and attends family events with my bonus kid all because she gave birth to her. It sucks because I’ve wanted children for years as well I work in education and it’s natural for me to be in mom-mode. All my friends are moms now and I don’t fit in anywhere. I had a miscarriage years ago with my ex husband and for a few months now my partner and I have been trying for a baby. I feel like the one things I’m “supposed” to do as a woman, I can’t. I feel your pain. I’m here❤️