Lynn CC said:This is the only possible way I would agree!
Under normal conditions there is no way, I would however plan something so your not home that night, maybe an overnight trip someplace. This way it's easier to explain to friends and you won't appear to be so overprotective.
I don't feel you are being overprotective at all, if we don't protect our children who will? There is no such thing as an overprotective parent, especially in today's world!
(also with my school) we had a co-ed sleep over at a hotel..It was only boys in a room or girls in a room.. we could hang out until 12am with supervision...(until security came cause we were having a boy vs girl dance off -teacher included-) but then girls had to go to their room and boys to theirs