I have two sons, one of whom is married to a lovely woman from New Zealand. They have two young children - my only grandchildren. They have recently devastated me with the news that they have decided to sell up home and emigrate to New Zealand. They live near to me now and are such an intrinsic part of my life that I don't know how I will cope when they have gone. Some problems are not amenable to solving, only to commiserating.
Family bonds can be so strong under certain circumstances that outside people are irrelevant.
Yet you know deep down that it's madness to put all your emotional eggs in one basket. Your anguish is very like a bereavement or a divorce. Pinning the blame on someone is a common response, and yet it seems illogical because it appears to prolong the agony. Maybe it displaces the pain, making it easier to deal with, perhaps in a situation where guilt is involved. She is actually reuniting her family, by taking her children to her home in her native to land to meet the other set of grandparents.