Hi, thank you for your question. Your son will need to consider his legal options in relation to this. Please confirm:
-How old his children are?
-If there are any court orders regarding the children, if so what are the terms?
Thank you for your question
My name is ***** ***** I have been a family lawyer for more than 30 years.
I note that your grandson is 10 months old and the step granddaughter is 7.
There are no court orders as the marriage is ongoing.
sorry that should have said grand daughter not grand son!
Your son needs to think carefully about his position before he follows through on his current plans to wait until he has moved to the States before he takes any action.
Indeed he should consider refusing permission for his wife to take the child to the US as planned.
Once the child is living in the USA then the issue of contact will be dealt with by the Courts in the State in which she is living - which will make matters a little more difficult especially if your son is not able to live there
Please encourage your son to seek immediate face to face advice on the current position.
In the UK the law says that a child is entitled to contact with both parents and the courts will enforce it if necessary.
In the USA child contact is also seen as important so your son will be able to maintain some form of contact no matter what
Please ask if you need further details
I will transfer the question to the US section