My middle school daughter benefited immensely from a similar friendship. The child is an absolute delight to have around, and I can honestly say that it is one of the best friendships (no girl drama, no disloyalty). I hope that we've also been a positive influence on her, and yes, I am quite happy to ensure that she gets some square meals and homework help at our house.

Certainly, set ground rules (and having your house as the meeting place makes sense, until you get to know her current guardians), but let the friendship blossom.