To any parent who has ever let their child spend the night with a friend, do you REALLY know the other parents??? I mean REALLY?? I have had tween boys spend the night at my house, and if it wasnt for me calling their Parents to confirm it was OK I would have never spoken to them.
AS for the first time my son spent the night away at a friends house, I didnt know the other parents all the well, just a conversation or 2 on the phone. I am feeling better about a couple sets of Parents and another set, well lets just say lesson learned and he hasnt stayed the night there again. (they thought it was ok to let the boys wandered the neighborhood till 3 am)
I hope all works out for you, and you get to know Step mom, and just keep in mind there can never be enough people to love your child.