Major first birthday party dilemma 😓

My family does not get along at all. My parents are divorced and can’t stand each other, and my in-laws refuse to be around my father.

I’m really disappointed because I don’t want to have to pick one family over another for his birthday party. I know if I invite them all they’ll ask who’s invited and when I say everyone, they won’t go.

I have a few options: invite everyone, invite my mom’s family (my mom is dying of cancer, she has a few months to live), or have 3 separate small parties for each family, which I’m not fond of doing.

I’m so upset. I wish adults could just get over grudges and grow up. It’s not fair for my son. I hope they change for his sake in the future.

What do you think I should do?