This is a really difficult post, and a pretty complicated story, I'm going to keep this brief. As a child I was neighbours with a little girl the same age as me, she was known as being a bit of an oddball and I was actually quite scared to spend time with her, but my mum completely insisted at times which was very unlike her. There were a few occasions that she did some very explicit, quite violent, sexualised things to herself in my presence (primary school aged) and I was very embarrassed and horrified. She also did things like tortured her cat, wiped bodily fluids on food, destroyed a lot of my toys and threw my favourite possessions out of a window ( just to be clear this is in no way a gripe I have in anyway, I feel incredibly sorry for her) just trying to explain some of her behaviour without too much detail. I never told my mum all of the things she did as I was very embarrassed. Anyway they then moved but I always had some pretty horrible memories. Recently I asked my mum why she made me have her over and she said my neighbour (let's call her Alice) mum had confided she was worried her dad was abusing her, and she had to work so my mum had to let her stay. Don't ask me why this was never reported, it should have been. They moved away before secondary school as Alice's parents were during this time in the process of separating. Through Facebook I'm now aware that Alice has two young children, her mum seems to be on the end of some huge feud and is not in contact, she is having a lot of time with her dad, posting photos of cars he has bought her, and statuses that refer to her having a child-free weekend. I worry for the safety of her children from their grandad if these allegations are true, but all I have is third-hand information and some odd childhood memories. Surely the grandmother would have reported him by now, and he is still in very regular contact with his daughter, but all I know is that her behaviour was very disturbed. Should I let social services know of my concerns, or would I be wreaking havoc on their lives?