I thought I'd post this on behalf of a friend who is having a problem and then send her the link. Don't want to embarrass or out her with too many details so I'll try to stick to the bones of the story.
She's the sad granny in the title and has a DD and son-in-law with DCs. They live in the same town but for many years they all shared a house with my friend providing childcare for her DD who was then a lone parent working away. The GCs stay over and visit frequently. Both the DD and my friend are quite fiery characters who have often locked horns, not least about the DCs with whom my friend is understandably very close and very protective towards. Probably too close and protective for their DM's liking.
The eldest GC is a teenager and this week, very upset, asked if they could stay with gran because things were difficult at home. My friend agreed and, when the GC arrived, it was clear they'd been physically attacked. Their DM had lost her temper. Horrified, my friend took her in and let the parents know the GC was safe. The following day, the parents picked up the GC directly from school, took them home, removed mobile phones etc and have now told my friend that she is never to contact any of them again. My friend is distraught.
I suggested reporting the assault but she's very reluctant to do that. She's asking me if grandparents have any legal rights which I don't think they do. However, I've also suggested that it's difficult/impossible to tell a teen who they can and cannot see. Wondered if anyone had been in a similar situation with grand-children and had any words of wisdom.