My sister was playing with her 5 year old Goddaughter when the 5 yr old touched my sister in her private place. My sister asked her where she learnt that from and her and the little girls expression and demenour changed. She went into lying mode. My mum, my dad, then finally my uncle. Who we do not believe to be all that stable. We tried to question her about it again asking her where her uncle touched her she pointed to her private parts. After that we tried to get more out of her and her story kept changing. Finally she outright denied that he touched her there at all. Should we be worried?? Please help