My partner's daughter who is in her 20s has lived with us for the past 18 months. She is frequently sad/angry about life and has a way of filling the house with her mood, if that makes sense. My mum and ex husband did the same and I have actively escaped both of those only to find myself living a very similar existence in my 50's. I feel like I'm too old and exhausted to live this way, and much as I try the moods and tension are difficult to ignore. My partner is very much about keeping his head down and trying to avoid provoking her, which I understand as when confronted however gently she becomes furious, but obviously it doesn't help. This month she has chosen to pay less rent. She didn't tell us but just didn't pay for a few weeks, then paid less. When asked to discuss she flatly refused, became angry and accused my partner of disrespecting her, when in fact it's the reverse, she tends to ignore or talk down to him. This isn't by any means the first time we've had a week like this, and I've finally cracked and told my partner I've been thinking of leaving for my own sanity and for my teen children (who can sadly spot an atmosphere at 100 paces due to years of experience with their dad and go into hiding). I would never ask him to choose between us even though it would be a nightmare for me to have to move out. I'm estranged from my own dad so wouldn't want the same for them . Of course now my partner is very sad and worried about me possibly leaving and I feel awful about that. Pretty down today and would welcome any advice, thank you.