DD1 discussed this with us before, but this time it was broached by her DH during their stay here for Christmas. Said he was re-doing his will but could not finalise as they have no-one who could legally take over the children should their ever meet their maker together before the GC are old enough.
We had been thinking about it too- and discussed it at length- so we said we would definitely be able to look after them, providing funds were made available for a part-time younger housekeeper to help- as it would be too much, with this big pile to look after. It was nice to see his relief, and mainly to feel trusted.
Let's hope we will never ever have to face this- but it is good to be clear and know in advance- and not have this what if Damocles sword hanging over their head. His parents are quite a bit older than us.
Have you made such plans with your children re the GCs?