A "depraved" woman who forced a 12-year-old boy to have sex with her has been jailed for three years.

Tracy Turnbull, 33, of Rookery Way, Bicester, was caught after the boy - who cannot be named - bragged to friends.

Oxford Crown Court heard Turnbull had appeared to carry the boy to a bedroom before forcing him to have sex with her.

Mr Recorder Arthur Stevenson heard that during a week-long period in June this year, Turnbull had intercourse with the boy and also involved a 10-year-old girl in her sex games.

Turnbull sat sobbing with her head in her hands as the evidence against her was read out on Friday.

She admitted having sex with the boy between June 19 and 27, sexually assaulting a child, sexual activity with a child, causing a child to engage in lewd acts and assault occasioning actual bodily harm.

Graeme Logan, defending, said a friend had called at Turnbull's house and "was so concerned at what she had seen, she contacted the appropriate authorities".

Sentencing Turnbull, Mr Recorder Stevenson said there was no question she should be jailed. He said: "You indulged yourself in a depraved manner with a boy aged just 12 years old."

He added Turnbull would serve just 18 months of her sentence and instructed her to seek help while out on licence during the remainder of the term.

She was also placed on the Sex Offenders' Register for an indefinite period.