I’ve never heard the term “Grey Rock” but I’ve actually been doing this for years ! My mum is 91, a controller all her life and now she has no one to control, I get all the hostility. I could fill a book with it all and made the decision years ago that I was in control of my life not her. I’m very assertive, not rude, I stop her mid sentence when she oversteps the line, and I tell her very little about mine or my AC lives. I’ve just lost another brother, but he didn’t speak to mum for 5 years at one time because of her controlling. She nagged my poor Dad all his life, and she falls out with anyone who won’t comply. I give her 3 hours a week, and I ring her once and that’s it. She tells everyone that I only spare her those 3 hours, so I’m glad that it’s registered. I refuse to be dictated to, refuse to be spoken down to and I refuse to be with anyone who angers me. I do not argue with anyone, I am placid and have many life long friends and am best friends with 3 AC and their partners. Mum is the one area in my life where I get angst, and I flatly reuse to pander to her, mother or not. As others have rightly said, this is not the behaviour of a loving and caring mother. She misses out on so many family get togethers because of what she is, it’s very sad but very true.