FOMO when kids are with grandparents.

I have been working on my anxiety triggers for almost a year now and my life has drastically improved. Something I haven’t been able to lessen is my anxiety when my kids are with my in-laws. I get anxious every time my in-laws ask to take the kids anywhere. Some of the anxiety does stem from lack of communication on their part. I’ve learned to accept that fact and work through issues the best we can.

However I get hurt when they ask to take the kids somewhere fun (the zoo, bowling, go-carts, etc) and don’t ask me to join. Im a stay at home mom so im always available. My husband has told me that they want to enjoy the kids alone without us there. I kinda understand but not completely. My parents are not in our kids lives so these are there only grandparents. So why do I feel like im missing out when they are away from me? Any insights? I want to be better.