Search:

Don't worry about what they do with her family or others. Just worry about yourself. Ask your daughter-in-law politely. I really miss "insert name", could I arrange to spend more time with her? I'd...

All good advice above, if you can't talk to your parents, talk to another mentor or adult. Teacher, neighbor, another extended family member.
Or. Write your parents a note.

Our kids are friends with the neighbors kids across the street. When our kids want to invite their friends over for a playdate, the whole family comes over. They plop down and we end up entertaining...