Sara well done. I have fostered for 2 years (and family fostering situation) and he has just left us...gutting  Its hard and rewarding at the same time. I think your situation will probably be easier though as ours was tainted hugely by the expectation that we actually adopt the child involved, which unforunately didn't end up being a reality. I would adbvise still though to decide what rules you want in place and keep them. Don't let yourself be swayed by the bad life that some of the kids might have had. Kids need boundires and often these children have not had them...and this has been shown in their lives by lack of rules, lack of general care and indifference.  IMO the worse thing you could do is be reallay lenient and let them give you sob stories, and the worst thing you could do is not care IYKWIM? By laying down boundries and rules etc you are showing you DO care and that the kids are more than their sad story.

Just my opinion from my experience. Good luck hun