The woman spoke about the actor’s appearance on Piers Morgan’s Life Stories programme when she was interviewed by detectives for the first time.
She said she was a “gullible kid” who was raped on two different occasions in 1967 at the actor’s then home in Lancashire — the first time when she was a 15-year-old virgin.
Jurors at Preston Crown Court were played a video recording of the police interview she gave last March.
Describing why she had decided to make a formal complaint after staying silent for more than 40 years she referred to the ITV1 broadcast.
“He was talking about the number of women in his life,” she said. “He was quite amused by it all.
“It made my skin crawl to be honest. It was just the way he laughed it all off. It was the sort of way he was laughing.”
Her complaint led to Roache, who has played Ken Barlow since the launch of the soap, being charged last May with two counts of rape.
The publicity that followed led to four other women alleging he had sexually assaulted them.
Roache, 81, of Wilmslow, Cheshire, denies the rapes and five counts of indecent assault involving the four other complainants aged 16 and under on dates between 1965 and 1971.
The rape complainant recalled a conversation with her son where she told somebody for the first time about the alleged incidents.
She said the discussion took place after the emergence of the Jimmy Savile scandal and later disclosures about Cyril Smith.
Her son asked her why the general allegations were just coming to light. “I said in those days you didn’t talk about things like that,” she said. “They would say ’go away, it’s lies’. These kids would not have been believed. I said 'I know that’ and that is when it started to unravel.
“I said I know things like this happen because I have been in a position like this.”
She said she had not wanted to “relive” the incidents.
Asked in the police interview why she had decided to make a complaint, she told the female officer: “It has eaten away at me. It is on the media all the time.”
The trial continues.