No Thanksgiving Invite for my Family from my Family

I’m a mom with 2 kiddos and a husband. I’m a little surprised at how like we are never invited to Thanksgiving on my Dad’s side of the family.
(The one I’m closest to)

My mom doesn’t really have one. But my Dad and step mom have a HUGE Thanskgiving dinner every year that my family, and my brothers family aren’t invited to.

I guess I’m just wondering if this is normal? Especially when coming from a divided family? Like my Stepmom just basically says they don’t have enough room and she invites all kinds of random people like neighbors and coworkers, homeless people puts on a huge to do… but doesn’t want US there.

My dad, you know he’s always been completely spineless so, I just often assume he doesn’t want to rock the boat. He just said one time, you’ve got plans right? You wouldn’t need to come over here for Thanksgiving? I was like sure! Ya! Okay!…. He called my brother and did the same thing…My poor brother he has absolutely no one either, no in laws or anything. We try to make plans but he prefers to hermit on that day and be alone and sulk he says….my kids also are confused and asked why we don’t spend any time with moms family on Thanksgiving.. it makes me really sad to be honest. I just don’t understand. When I have my own Thanksgiving everyone will be invited.

Any advice? Every year I catch myself crying over it, and feel just well.. left out. And sad that neither my mom or dad have a desire to see my sweet little family during the holidays. And quite frankly they don’t seem to care to or understand how that could be hurtful.