Grandof2 - it’s going to be so hard - I feel for you. My darling mother was in your position, 50 years ago. She was very close to my children and practically brought them up. We left for the UK, with the hope of returning home, after my husband (now Ex) obtained his FRCS. I can still see her on the tarmac ( local airport) wiping away her tears as the plane took off. We were excited about our new life, not realising how my mother’s heart was breaking.
We did go back for holidays, and brought her over here too. But I was not at her bedside, when she died. I was in the middle of an acrimonious divorce.
Is your daughter emigrating or is she moving a couple of hundred miles away ? If it’s the latter, you can always visit them and vice versa.
I know you will support her in this decision, regardless of your pain. Look after yourself…