Hi, thank you for your question. Are you in England or Wales and how old is the child?
Are you in England or Wales?
Thanks for confirming. Legally, the child has a right to a relationship with its extended family - including grandparents. It is likely that the mother wishes to exercise this and it would be difficult to prevent her from doing so - legally if she tells them she is not breaking any laws.
However, given the sensitivity of the issue, I would suggest that you amicably agree with her that you will tell them yourself as this would likely be better than it coming out of the blue from her.
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