Hurt feelings are tricky. They can spring up even under benign circumstances. It’s natural, as you observe, for your daughter-in-law to see her family more often than you if they live close by. And I can’t speak for everyone, but I feel closer to my family than I do to my in-laws, and that’s reflected in my social media, too. Still, I sympathize with your feeling of exclusion: I know it hurts.