I'm sure I'm older than most of the ATers, but I am still surprised by the amount of comments that smoking around the baby is so terrible. By the discription of the childs current home life, parental example, and lack of a current address, I don't see how smoking becomes a measurable issue.
When I was a kid almost noone had a "smoke free" house. The 2 or 3 "smoke free" households I recall up until I was about 30 were the biggest jerks around. Times have changed alot in that regard, but this childs life would have to improve 1,000% for smoking to be a problem worth considering on any level.
It's a good thing she wasn't paying rent, because there could be legal issues to getting her removed if she was.
Good luck to all concerned.
Jim