Jack Langdon, 19, tricked the child's family into letting him look after his young victim before molesting her at her home.
The girl told her mother that she had been watching TV on the sofa when Langdon put his hand through a hole in her leggings and touched her. She also said the teenager told her he had "naughty images" on his mobile phone. Langdon - who had also been posing as a girl to get young women to send indecent images to him- admitted one count of assaulting the little girl in December 2015.
But instead of accepting responsibility, the predator tried to shift the blame onto his victim - telling a probation officer she had been acting "all flirty" with him.
Vile Langdon also said the nine-year-old had "a sexual need that needed to be met". Langdon was jailed for four years after he admitted one count of sexual assault, three of distributing indecent images and nine of possessing indecent images.
