Family

Hello Buonanima. I think you are worrying unnecessarily. The close relationship you have with your D's has been built over their lifetime and them being busy is not a precursor to losing that closeness.

It's not unusual for at times friends to be prioritised over parents, as that often entails social get together's that also include the children.

Don't allow this worry to cast a cloud over what appears to be a good life.

I will have a longer think sometimes, but I do know of one very busy lady, who I have seen on more than one occasion, walking around a supermarket doing her weekly shop, with say a cousin.
I dont think it was an accident that they had met there.
Might that be an option for you at all?

I am not sure that counts as quality time.
But I think there are lots of us granmothers/granddads, who have snatches of time and moments while the grandkids are younger.