Jasinder Grewal carried out the brutal attack in the early hours of New Year's Day, following a night out.
Jasinder Grewal
He had originally denied rape, claiming the sex was consensual and that he knew the woman, but changed his plea midway through the trial yesterday.
Nottingham Crown Court heard he did not know the couple and it was a purely random attack.
Dawn Pritchard, prosecuting, said Grewal's teenage victim's life had changed dramatically since the rape.
"It's with her everyday," she said.
"She hasn't slept properly, often cries herself to sleep and has flashbacks.
"She's suspicious of people. She has mood swings and feels like a Jekyll and Hyde character."
The court heard that the teenager was raped twice by Grewal after he tied her boyfriend up and took her to a bedroom.
He then got into bed with her and tried to cuddle up with her for several hours.
Her boyfriend managed to struggle free and call police.
Grewal was disturbed by the sound of a police car and jumped out of bed.
He found her boyfriend in the kitchen and got down on his hands and knees and begged him not to tell police what had happened as he had children.
Yesterday Grewal, 30, of Mapperley Plains, Mapperley, admitted he raped the woman twice and asked for charges of aggravated burglary and two charges of robbery, in relation to the woman's wallet and a laptop, to lie on file.
Sentencing Grewal Judge Tony Mitchell said: "The jury will have seen themselves, when she was required by you to come to this court and give evidence against you, the sort of person that she is: a straight-forward, nondescript young woman who you violated not once but twice, who you put in fear over several hours."
He added that he had been given a generous allowance by his father that night and was clearly "an indulged young man."
His barrister Keith Raynor said Grewal had been out on New Year's Eve with friends and was dropped 100 metres from his father's shop in The Meadows.
"It seems to me, on the evidence, to be a moment of unfettered madness on his part."
Judge Tony Mitchell told Grewal he would serve eight-and-a-half years of the 17-year sentence in custody. He is now on the sex offenders' register and banned from working with children indefinitely.
The judge said: "I give you some credit for the fact you have called a halt to this charade of a trial."
Grewal has previous convictions for robbery, handling stolen goods, burglary, possession of an offensive weapon – a rolling pin – and common assault.
