I think you are feeling a bit sorry for yourself here but remember, a child can't have too much love.
None of us know what life brings.
I am grateful that there's another set of grandparents to help my son's family if they need it.
I am equidistant with the other grandparents but the other grandmother does a lot more on a day to day basis. I am happy that my son and family have her support with school runs and sports runs and so on.
We do see them less - but when we do they are visiting us, chatting, playing board games, baking and doing things very differently to the other grandparents.
I'm sure my daughter-in-law will often call on the other grandparents first but we will drop everything in an emergency.
We have just had a lovely week away with them making sandcastles, in the sea, looking for crabs and shrimps. The little ones run to us when they see us and know we are safe and loving.
This will be remembered just as much as the school run.
Don't see it as a competition.
Try to be generous in your own mind about the love of the other grandmother to the little family that you also love. I think if you can remind yourself that this is about love for your son and his family then you will become more accepting over time.
💐