Lots food for thought and thank you all for your replies.
Perhaps I should have added that I have older grandchildren and we haven't looked after them on a regular basis either although we've done lots of babysitting and helped out in emergencies. We have lovely relationships with the children, all warm and loving.
I suppose I must accept that we're all different. I am afraid I don't see a regular babysitting commitment as an ' honour'. I see it as a tie, even though the baby is gorgeous.
I had to bring my children up alone. Their father didn't want to know and we divorced when my four were still at primary school. Two of my children have chronic illnesses and parenting alone was for me fraught with worry. I also worked full time to pay the bills so had to engage a child minder. Life was very hard, with little joy as I also had to look after my frail elderly mother. I met OH when my children had just left school. I'd endured the teenage years, the worries of young adults etc. Childcare problems morphed into young adult ones. Then I became very ill, for a long time with one illness and operation following another. I went back to work when I could, at the age of 59, because money problems necessitated it. Life has been hard, and my OH has been such a blessing.
I really am loathe to give up a whole day, on a regular basis to childcare. Much as I love my dgc, I cannot say I am stimulated by babies, nappies, feeding and small talk. I felt the same way when I was a mother, and it's almost taboo to admit childcare, even with its fun bits, is tedious. I am in a minority probably and I have no wish to offend but it just doesn't rock my boat.
I still have to be a rock for my own children. They've had problems in adulthood, mostly of the broken heart variety. I worry about them still.
I have got to the stage where, selfish or not, I want to live a bit - put my own needs first.
This time in my life has been, well, a long time coming and in many ways I feel I am owed it. My health isn't wonderful but no one would know because I have so many hidden ailments and auto immune conditions. I like having g free time and I like being spontaneous. OH feels the same way. We both feel this is our time and relish having fewer responsibilities after us both retiring after 40+ years of work.
I am sure some will say we are selfish but very few of our generation expected grandparents to shoulder the task of full time care for our children.
I know for many young parents childcare costs are prohibitive and I expect we'd feel duty bound to help out if this were the case, but it's not.
We live about 28 miles way from son, so to get there in the mornings would take about 50 mins, in rush hour traffic. I cannot pretend a day that started like that in order to feed, change, soothe, talk with a baby, feed, change,sooth, clean up after, talk with a baby.....you get the picture.. until at least 6pm would bring me joy. It doesn't reflect in the child at all. He is adorable.
We really don't want the commitment, much as we love our newest grandchild and his parents.
The air is still quite frosty. I invited them over for dinner this weekend, as a sort of olive branch, but they declined. 