For background - my siblings and I had an abusive childhood. Our parents were drug addled alcoholics. My father was sadistic and violent, my mother was a nasty enabler. I'm the youngest of four, my eldest brother is 9 years older than me (one of my earliest memories was being given the nickname 'the mistake' by my father) and was 7 when we were taken by my grandparents when they realised how bad it had got thanks to my teacher.
A number of years ago my father was terminally ill in a hospice. My sister decided to visit him. This led to eldest brother decreeing we all should. I've been cut out (after a lot of shouting, threats, and nastiness) for refusing anything to do with visiting him, organising or attending his funeral. It was a very, very nasty time with some really horrible stuff being said and done. Mostly by eldest brother, but other brother and sister backed him up.
Eldest brother married young and his wife doted on me. In my teens she was like a cross between a big sister and an Aunty. As my GP's were old she was the one who helped me buy fashionable clothes and talked me through the range of sanitary products. It was very upsetting losing contact with her and my nieces and nephews over the saga with my siblings (she was banned from contact with me).
There was an incident where my brother assaulted his wife. She left him and came with my nieces and nephews to stay with us while she sorted out somewhere to live. Sadly after a couple of months she decided to take him back. At that point one of my nephews, who was almost 15, refused to return to the family home. He has lived with us since. My brother was extremely nasty to his own son - he even tried to sabotage the process of nephew showing he was financially estranged from his parents when he wanted to go to uni.
One of my nieces has now realised what a vile bully her father is. She has asked to come and stay with us until she saves for a deposit for a rental flat. She thinks it would take her around five or six months as she works very part time around college.
However since taking in nephew I have a younger child who is severely disabled, plus my MIL now lives with us. Lockdown was horrendous last year with everyone home all the time, medical appointments coming out of my ears and stress levels extremely high. We're just about getting everyone back on an even keel. I'm not entirely sure I could cope with my brother starting on me again - when nephew moved in here we ended up having to call the police 11 times when he turned up.
Would it be really shitty to say that we can't put her up, but we could give/lend her the deposit for a roomshare or flat? Technically we have space as the four eldest, including nephew, are at Uni, but they all come home in the holidays so then it would be a nightmare as my niece doesn't get on with any of the other teens. That may change now that she's realised what her Dad is like, but she's said and done some horrific stuff to her brother over the last few years so having them both here isn't an option really.
At the same time though she's 18 so not helping her seems really crap.