NC for this as I'm sure I will be heavily judged.
My little sister (S) moved in with me, DH and our 2 children 18 months ago. She has just this week turned 16. She ran away from our mum's due to multiple issues, all backed up by a long history with Children's Services. She is happy here, loved and cared for, but we get no support - financial or otherwise - and I recently approached CS for help. They want to assess us to be 'friends and family foster carers' for her, which will open up support for us and for S.
The assessment is rightly very thorough.
Points in our favour include;
- S has already lived with us for 18 months.
- S is (and our own children are) clean, fed, happy, attending and doing well at school, attend extra curricular activities, needs are met (eg I take her to appointments as required such as dentists or doctors).
- Referees (mother-in-law, close friend, our employers and our own children's school teachers) have all provided very positive character references for us.
- Our home is 'big enough', and is safe and well maintained.
- Both DH and I have jobs with long service.
- No criminal history, backed up by DBS checks.
- My medical history is fine, PND after my first child but otherwise nothing major.
But there is one thing I'm panicking about. 8 months ago DH went onto anti depressants. They seemed to make him feel worse and really weren't helping. His doctor advised him to 'give them time to settle'. 2 months after starting the meds, he went out with some friends one night, bumped into an old school friend, and my DH of almost 20 years took cocaine. He met up with this 'old friend' a handful of times following this to take cocaine. I was devastated when he told me, but it was so incredibly out of character that I said I would be supportive on the condition he speaks to his doctor about what's happened, gets his meds changed, and doesn't do it again. He did just that, and he blocked the friends number, and I'm confident that he hasn't done anything since.
But of course this is on his medical file now... and CS rightly want to run medical checks... and I'm terrified this will cause issues. I'm terrified S will be forced to move out if we don't get through the assessment 
Are there any social workers, or anyone with any sort of experience, who could perhaps offer any words or advice?