I have spent far too long this morning reading this woman's website. Whilst I have nothing against the idea of writing letters to 'absent' DGC I think the letters should confine themselves to memories and family histories, big events etc. Like Dollie I am concerned that such letters might leave a burden of undeserved guilt on the DGC if they read them in the future and realise how much angst has been caused to the 'invisible' GP.
I admit that my thinking has been heavily coloured by the distaste I felt for the author engendered by her self centred, me, me, me viewpoint. It seems to me that both her DGC are happily living in loving, stable families and are well shot of the disfunctional family of their natural father. The Invisible Grandmother, who was content to be a part-time mother, seems to want to be a 'hands-off' GP with occasional visiting rights, so that she can pass on her 'family values' to her genetic offspring. No thought is given to the welfare and emotional stability of the children.
I sometimes follow the threads on Gransnet for Grans who have been cruelly parted from much loved DGC but not being in that particular boat myself refrain from commenting. However, I don't think any of our grans have anything to learn from this invisiblegran website - far more support, ideas and comfort here on Gransnet.