Thanks guys
I did explain to DD the reason why I didn't want her to sleep over, and also that it wasn't because I didn't trust her, but that sometimes things happen when we least expect them to.
Also had a talk with the mum and told her she was being a bit naive about the whole thing, she still doesn't get it...
Her DD is turning 15 and is on the Pill already, if that isn't playing with temptation, then I don't know what is....

Thanks again for the support, makes me feel a lot better O