It is a big deal, regardless of what people are telling OP. It's a big deal because MIL did it on purpose, she deliberately tried to keep OP's mother, grandma and kids away because MIL had to be the main character in the movie, the only one who mattered. Disgusting narcissist.

NTA. Mil knew how important having op's mother and kids there was to op. And the ones saying op was overreacting clearly did not get the point. It was NOT ABOUT MIL. It was about keeping op in the best possible state to give birth, especially after the trauma of their second child. People who have not been thru something have zero right to judge how the person going thru it should feel. Mil fooled around and got kicked out of the whole thing. 😮

If it's an ongoing thing, maybe. But if this is a once moment, chicka needs to take a chill pill and let the hormones settle down. Ultimately, no one gets a perfect anything. We need to be grateful for what we do get. Our negative emotions stem from unmet expectations. Why couldn't her mum take a taxi? Also, rude of OP to expect an elderly lady to care for two children in a hospital waiting room when those kids would normally be asleep just because she wants them to meet the baby straight away instead of first thing in the morning. What if she was in labour all night? What, her kids and their great grandma would sleep in waiting room chairs? OP seems to have a touch of main character syndrome. MIL should have spoken up about the plan if labour started at night. This way seems like she never planned to go ahead with it. I also think OP needs to get over it, be grateful for what she did get, and focus on creating more and better memories. They all begin to blur together at some point anyway. At some point this singular event won't matter. But a lifetime of bitterness and division, that stems from it, will.