Okay. So. My step daughter is 4 years old. I have been in her life since she was a baby. Me and my hubby are now expecting our first baby together and I am setting firm boundaries with my MIL who has had a habit of overstepping ever since I came into the picture. Me and hubby have 50/50 custody of my step daughter with her bio mom with a week on week off arrangement. During week days MIL takes my step daughter either to her house or to school (she has pre K Tuesdays, Wednesdays and thursdays) and brings her back home to me and hubby when we are both off work at 5. A few weeks ago, my step daughters mom signed her up for dance. Dance happens on fridays, I rarely work fridays as I typically only work 4 day weeks due to lack of hours thanks to covid. During me and my hubbies weeks we agreed that instead of my step daughter spending the day with MIL while I stayed home and did chores and errands I would start keeping my step daughter and taking her to dance and just having a girls day on fridays since it is also the last day of the week we have her before she goes back to her moms. Well. My MIL flipped out when we told her this. Even went so far as to come into our home after dropping my step daughter off with us one night only to start a fight infront of my step daughter, yelling at me and my hubby about how she is entitled to that time with her granddaughter and continued to force my step daughter to stand next to her and any time my hubby raised his voice towards MIL she would grab my step daughter and retreat to my step daughters room where we could hear her whispering things to her (not sure what). Finally, after probably 30 minutes to an hour of this MIL finally left our house. Me and hubby thought we had dealt with the problem after this. But I guess not. Today my step daughters mom messaged our group chat that includes myself, my hubby, her fiance and of course, my MIL. My step daughter has some warts and we haven't been able to get them dealt with lately as our clinics in the area were out of what they needed for it. Bio mom was informed they were restocked and asked if we could take my step daughter during our week in hopes she wouldn't freak out like she does with her mom. Before me and my hubby could respond MIL jumps intl there saying she will do it when me and hubby are working. Is it stupid of me to be upset about this?? Our clinics are open late and open on the weekends, there is no reason my hubby or myself cannot take her but MIL immediately just tells bio mom she will? She sees herself as my step daughters parent and it is so concerning sometimes. I can only imagine how she is going to act when my son is born, especially when she realizes I will go full on mama bear with her if she do much as holds my baby too long.