Completely empathise! We had our 39 year-old daughter with us for 4 weeks (2 weeks pre LD, 2 weeks during). Adult children who haven’t lived at home for 20+ years seem to revert to stroppy teenagers in this situation. Our daughter had been off work with stress initially and came to live on our smallholding. Her doctor deemed her fit to return to work after 4 weeks and she herself decided that would be the right thing to do. She then proceeded to behave like a child for a day - not speaking, refusing the (vegetarian) meals specially prepared for her, laughing uproariously all evening with friends on a house party app - before apologising the following morning & not really wanting to go home. The month had already been really trying for us (walking on eggshells, accommodating smoking, vegetarianism & a ‘medicinal’ weed habit) and so I calmly said that I thought the time had come for her to re-engage with her own life and work, rather than the artificial existence here with two 60+ year-olds. My husband drove her home (a 5 hour round trip) during which she didn’t speak to him & she subsequently refused to respond to texts and calls for 3 weeks. We were worried about her, but knew she was fine as she remained in contact with her younger, married sister. She finally resumed telephone contact this weekend & I guess we’ll have to dissect the whole situation over the coming weeks. She does seem to have (at last) taken responsibility for herself, which is gratifying, but has been a difficult period. So, in summary, I do think you have to address your situation as diplomatically as possible: it’s your home after all! However, do be prepared to find that it won’t be heard graciously and there may be some unpleasant fall-out before the parent-child balance is recalibrated. And, before I get it in the neck from Gransnet terms, I’m not saying we handled the situation perfectly but some self-preservation & sanity has to come into play at some point. Good luck!