The teenager told police he chose his sister because she was small and "couldn't remember stuff"
A boy of 13 has admitted raping his eight-year-old sister after watching porn on an Xbox.
The teenager, from Lancashire, told police he had seen the x-rated material on a games console with a friend and "decided to try it out".
He said he had chosen his sister because she was small and "couldn't remember stuff".
The youngster appeared before Blackburn Magistrates Court today where he also pleaded guilty to indecently assaulting the girl and inciting her to perform a sexual act on him.
The boy has been bailed to live with relatives away from his sister while the youth offending team prepares a pre-sentence report on him.
The little girl is now being supported by specialist officers.
Blackburn MP Jack Straw said it was the responsibility of internet service providers to make sure children could not access sexually-explicit content.

