A grooming victim of Soham murderer Ian Huntley said he threatened to "kill her" when he found out that she was pregnant.
Emma Rawson fears her refusal to report Huntley when he had sex with her at 15 left him free to kill Holly Wells and Jessica Chapman in 2002.
She started dating the murderer, now 47, in 1995 after being kicked out of her abusive family’s home.
But their relationship turned sour when Huntley began working at a Grimsby fish factory and came home one night to tell Emma: “I’ve met someone else.”
She said: “I thought everything was hunky dory. Then this woman moved in and I had to pretend that I was his sister. My heart ripped in two.” Weeks later Emma discovered she was carrying Huntley’s baby.
Recalling the moment she told him about her pregnancy, Emma said he gripped her by the throat and warned: “If you spoil this for me, I’ll kill you."
Emma, now 42, continued: “He said, ‘If my new girlfriend finds out about this, you’re dead’. I knew he was capable, I was already scared of him.”
Emma then left the home but had a miscarriage. She said: “I’m very happy I lost the child. I wasn’t devastated. At that point I was 16 and pregnant to a scumbag. I hated him.
“I’m so relieved. Can you imagine trying to explain to your child that their dad is Britain’s most evil killer?
“Or even telling people you had a child with Ian Huntley?”
She had lied to social services about her fling with “first love” Huntley seven years before he murdered two 10-year-old girls.
Emma added: “Had I said we were sleeping together things might be different. I feel guilty. He’s evil.”
She told how Huntley even set up a bed for her in a spare room at the flat in Immingham, Lincs, to dupe social services into thinking they were not together.
She said: “He had made it it look like I was sleeping in there, but I wasn’t, I was sleeping in Ian’s room.
“It was so calculating. I was happy to go along with it, because I had a roof over my head and I was in love. It was easy to deceive social services, easy. How can a 15-year-old girl make them believe I wasn’t in a sexual relationship?
“Looking back, the police should have been banging the door down. It was a missed opportunity to stop him. If he was put on a register he would never have got a job at Holly and Jessica’s school.”
It is nearly 20 years since the schoolgirls vanished while wearing replica Manchester United strips on August 4, 2002, after attending a family BBQ.
They had left to buy sweets when they were lured into the home of evil Ian Huntley.
He claimed his girlfriend Maxine Carr was in the house. She was a teaching assistant at Holly and Jessica’s school.
But when the girls went inside, Huntley murdered them and hid their bodies.
A manhunt was launched with more than 400 officers working around the clock.
For 13 days the world’s media camped out in Soham as it progressed.
Huntley was even interviewed by reporters and helped in the search.
Two weeks later, the girls’ burnt remains were discovered in a ditch at an air base 14 miles away at Mildenhall, Suffolk.
Huntley denied murdering the pair when he appeared in court. But he later admitted to killing Jessica to prevent her from raising the alarm, after Holly died in his bath in
an “accident”.
Carr was charged with assisting an offender and jailed for three and a half years. She served 21 months. Huntley got life and was told he would serve at least 40 years.