NC as very outing.
A year or so ago, DH's SS and BIL fostered and then adopted the BIL's now 14 yo niece. I'm not well informed about the circumstances but I believe the mother was an addict and the girl was frequently left to fend for herself for entire weekends.
DH's SS has always been a very cold, hard person, so the adoption really changed our opinion of her. However, we've just found out that they have handed the girl over to social services a few weeks ago and she is with a foster family. Again, details are unclear but the ones we have been told just seem mostly like normal annoying kid behaviour, plus some more worrying issues like sexting. We know she was in a psych ward recently and ended up having to stay there until a foster family was found as the SS wouldn't have her back.
We've only met the girl a few times and she seemed nice enough, and literally starved for affection (trying to make up for it by never letting her uncle/adoptive dad go). She's spent time with our own 14yo DD and they get on well.
DH, I, and MIL are all appalled at this situation. Step FIL supports his daughter and doesn't see the issue--the girl has "ruined" their family life. We know that BIL is extremely upset and are meeting him tomorrow to chat.
Both DH and I independently wondered if we should try to foster this girl. Our DD is horrified by what's happened and has asked the same thing.
We're not in the UK so I don't need legal/financial details as such, but what do we need to think about family-wise before even suggesting this as a plan? As well as DD we have three DS, 12, 10 and 5. We both work full-time but are quite flexible (I'm self-employed). DD and one DS are autistic, so we already have experience of MH issues and attending many appointments.
She has four more years of school, starting high school in September, same as our DD, so presumably that's the maximum length of fostering. (I do wonder if her uncle/adoptive dad might separate as a result of this and take her back in, but that's just conjecture.) I just feel so bad for this poor kid, having such a shitty start in life, thinking she then had a stable home, and now being quite cruelly rejected yet again. We could do something to help--but would it harm my own DC? Could I handle it?
We have no real relationship with DH's SS and family except seeing them at Christmas so don't care about treading on toes or upsetting people.
For context, we have an ex-stray cat that I am allergic to and whose presence causes our other cat (who is DD's and therefore has to stay at any cost) to shit all round the house, and we can't even bring ourselves to rehome her, so clearly we often let heart rule head...
I would appreciate any thoughts.