I'm asking this for a friend - yes really - honestly! My DB is a 12 year old DD's godfather so he's invested a bit in this awful situation.
Situation - DB's best male friend is/was a single DF to 3 DD's from when the youngest was 13 months and eldest approx. 4/5. He is now engaged and has a 5 year old DS with fiancé.
His DDs have contact and stay in holidays due to distance with their DM who has a new SO and a 5 year old DD who is their half sister.
About a year ago his middle DD (14YO) decided she wanted to live with her DM and moved there, in the autumn her DSis 12YO moved there too.
The DM drinks a lot (2-3 bottles of wine a night and is an ex drug/alcohol addict) apparently is using them living with her to enable her to get a larger council house, not sure about the truth of this but that's what has been heard. The DD who's 5 is apparently mostly ignored, sent to her bedroom after school/dinner and is normal (no special needs etc) but cries and says she doesn't feel wanted. The middle DD is treated apparently as a 'best friend' by the DM, they smoke roll-ups together etc and drink alcohol.
The younger DD (12YO) wants to return to live with her DF and his fiancée, her DSis who's 16 lives in the family home and studies A levels now at college. They live in a small maisonette (half of a 3 bedroom in total if this was whole) 1920s/30s' house) - they occupy ground floor but this is a bought/mortgaged house. Since both DD's moving to their DM's everyone has their own bedroom, they had to share before. the DF has his own 'bar' in one room which could be a bedroom. He drinks and smokes - maybe slightly more than usual.
DD12YO is currently staying and wanting to move back ASAP to her DF's house but he keeps on making excuses, first it will be hard to get her into a secondary school, then cost of school uniform too much, then no space at family home now etc. Both he and his fiancée work in fairly good jobs and they could build an extension in their large garden.
There is also a potential safeguarding (I think this is the term) risk as the SO of this girl's DM has physically assaulted the DD's and has had a court order or something taken out on him. He also groped me as a teenager (another story) but I don't mention this too much - don't think he's tried to grope the DD's.
the 12YO DD when she lived with her DF and fiancé about a year or two ago tried to harm her DBro (half brother) and also some kittens but has since apologised and realised why she did this.
My DM and DBro and I saw her yesterday for the afternoon/evening and she spoke to my DM quite calmly and reasonably about her behaviour and is a clever and bright girl.
No one else - DBro or me or my DM - have room or really want to foster her - but what would you do? The other family AFAIK have moved a long way away (Scotland and elsewhere) or can't take her.
What would you do? What can be done? I'm concerned for her but so is DBro as she is his goddaughter.