IMHO you are being bullied into supporting your DD to the limits of your finances and capacity. I appreciate that you wanted to vent about the Tik Tok video but that person is not you. I’d refuse to look at it/ them in future.
Your story makes me wonder how your DD would cope if you lived far away or had already passed. I’m sorry but given the information you have shared, in order to save your health and sanity, it’s time to take a step back, even if it’s something around your age and health. Set boundaries.
You and Yours to be cut from BBC radio 4 schedule


