I feel for you Ginny, what a horrible situation to find yourself in. You have already apologised so don't apologise again. I would do as others have said and carry on as if nothing h as happened, whatever you do, don't ask about what you have done over the past seven years that has been so dreadful, because you will be upset at the nitpicking. I speak from experience here, my daughter and her husband have engineered problems in the past with myself and my husband, I should say here that my daughter has mental health problems, but her husband doesn't, and in the past we have discussed, reasoned, been accused, but finally we stopped responding, and refused any more apologies and grovelling for things we didn't even know we'd done, and After a while, they finally accepted that we would not go down that route any longer. No more apologies, no more eating humble pie, BUT we continued to offer all the childcare, help, gardening, fixing things that we'd always done, but no more grovelling, it gets you nowhere, they always want more. My daughter's mental health issues obviously have had an impact on this scenario, it doesn't sound as if there are any such issues here, your SiL is just plain rude.