A teenage girl murdered her own mother and younger sister after they fell out over her new boyfriend, it can now be reported.

Kim Edwards was just 14 when she roped in her boyfriend, Lucas Markham, also 14, to carry out the "brutal executions" of school dinner lady Elizabeth Edwards, 49, and 13-year-old Katie as they slept at their home in Spalding, Lincolnshire.

After stabbing the pair to death, the teenage lovers, took a bath together, had sex and then watched the film Twilight, while eating ice-cream.