I was thinking about this and shaking my head as to why Meghan seems to set out to offend and upset her family by marriage. Then a similarity occurred to me with the behaviour of the classic 'abuser' in a relationship (believe me, I knew one). The method is simply to isolate their partner from their support groups and family so that the abuser is all that the partner has. It's well known.
In France I came across several examples of this, including one lovely woman who sang with our choir for several months, but had to stop because her partner 'didn't like her being out with us'. When I tried to get her to stay singing once a week, she said simply that she didn't want to be homeless in France. She had nothing else but her control-freak and she was helpless.
Prince Harry does, of course, get out and about - but the similarities are strong.