A man facing 37 allegations including rape, kidnap and attacks on children was branded "pure evil" as a teenager described how she and her little brother were abused at knifepoint.

Joseph McCann, 34, allegedly tricked his way into a family home in Greater Manchester on May 5.

He tied up a mother and molested her children, aged 17 and 11, saying: "If you move, I will kill your kids," the Old Bailey heard.

The 17-year-old girl told how she feared becoming McCann's "sex slave" before she jumped out of a first-floor window and limped to a relative's house.

In a video-taped police interview played in court, the teenager described how her attacker had initially grabbed her, put his hand over her mouth and told her to "shut up".

She said: "I managed to wriggle out of it. He pulled me down onto the floor. That's when he must have knocked me out. His knife must have cut me in a few places.

"I was shouting 'mum, mum, mum', but at this point he had the knife.

"My mum was like 'what are you doing?', trying to stop him."

McCann allegedly tied up the mother for being "gobby" and ordered her not to move.

The teenager claims he took cocaine and swigged vodka before repeatedly sexually assaulting her and her brother.

She said: "When I did not do what he said he kept putting the knife up to me.

"In my head I was trying to think of alternative ways of trying to get out of this situation.

"I could not do anything about it. He took the knife with him everywhere he went.

"He kept brushing it on my skin. That's more like an 'I'm in charge' thing.

She went on: "I mentioned my brother was 11 and he said 'shit I didn't know that, how old are you?' I said 17.

"He said me: 'you are going to Europe tomorrow, you are mine'.

"At this point my life flashed before my eyes. I thought of marriage and everything.

"I'm going to be his sex slave. I thought, I'm not having this."

She added: "We kept being held hostage, being abused at knifepoint. It's scary. It's awful."

The court heard how the girl fractured her heel when she jumped out of a window naked to escape.

Earlier hearings heard how McCann was alleged to have abducted and raped women in Watford, Walthamstow and Edgware.

McCann, whose address is listed as in Harrow, denies 37 charges relating to 11 women and children.

These are 10 counts of false imprisonment, seven counts of rape, one count of rape of a child, and two counts of causing or inciting a person to engage in sexual activity without consent.

He is further charged with seven counts of kidnap, one count of attempted kidnap, three counts of causing or inciting a child under 13 to engage in sexual activity, three counts of assault by penetration, one count of sexual assault and two counts of committing an offence with intent to commit a sexual offence.