Hello and happy new year!
Are you familiar with Tim Challies’ excellent (and popular) blog? I follow it and recommend you do the same.
Here’s a taste of what you’ll find on Tim’s blog: His #1 post of 2014 was a thoughtful examination of the dangers to children inherent in sleepovers. This is highly recommended reading for young parents. Here’s the link to Why My Family Doesn’t Do Sleepovers.
I personally had a bad experience when an older teen boy attempted to molest me during a sleepover when I was 15. Nothing came of it since I was the stronger of us. Back then, I naively thought of this as weird and “gay,” but not criminal or dangerous, so I never reported it. Now we’re all a lot more aware. Challies’ article points out that molesters are often the kids themselves, or older siblings or cousins, not the unknown parent.
So, BE CAREFUL!
For the record, our children were allowed sleepovers rarely, and only when they were older. We were always very, very, cautious. I advise you to err on the side of caution, too.
My you experience the grace of safety from harm in the new year.
Lon
Average Us 
Every parent should read this, and heed these warnings. I have always been what some would say “overprotective” of my children because of my own past. I know how often things CAN happen, and DO happen to very innocent children, who end up being scarred for life because of it. I will relate this one experience of my own daughter – when she was 7, she was invited to a little girl’s sleepover birthday party. I personally didn’t know them (even though her dad was a teacher at her school) so I only allowed her to stay for an hour or two and brought her back home, to her chagrin I might add, but, hey, I’m the parent, she’s the child. We found out years later that the girl’s father (the teacher) had been arrested for molesting children for years. Praise God that He gave me wisdom to protect my child.
So glad you and your daughter didn’t suffer this. Praise God for his kindness.