Divorced grandparents - how do you handle bday parties?

How should we handle birthday parties for your kids if husbands parents are divorced? Do you invite all the family to the party? We live a few hours from most family so it’s not just a quick stop in kinda thing. My MIL keeps asking when we are having my daughters bday party next month. She usually stays at our house when she visits. We see her every other month or so between us taking turns traveling to visit each other. We live right by my parents so we were at least gonna do something with them.

We haven’t even talked about a party yet but if she wants to be here for that, then we will prob do something small

But then I feel like we need to invite all of the parents. And all siblings then too. But is that awkward inviting all the parents together, esp since we only have room for my MIL overnight here? I guess whoever shows up does right? I don’t want anyone feeling left out, but at the same time my MIL is offering to visit, so I don’t wanna take away from that either ??

Any advice or experience would be great!