baby momma drama

So a little back story my boyfriends baby momma has been keeping his daughter away from him since October when she filed for full custody and that he is only allowed to see her when she says and if his father there to supervise the visit. Anyway temporary orders are allowing him to see her for 5 hours each on every other weekend and ever two days a week for 4 hours. Until we go back to court in July when it turns to 50/50. The temporary orders are so that she can adapt to seeing us more and it not be such a shock. But this week was special because we have family in town to find out our baby's gender and my graduation. We had asked for his daughter for 3 days in advanced so that she could be there for the all the celebrations. Her mom had time to think about it and even said yes. Now the day before the reveal she is saying that we can have his daughter from 4-8 for the reveal but that's it. I'm just kind of venting and am so frustrated with this. Plus there's really nothing we could do :|