The alleged assault was one of multiple incidents during years of repeated and "degrading" sexual abuse that left his victim with lifelong injuries.
The now 79-year-old, who denies the claims and is not facing criminal charges, has also been accused of assaulting the teenager in the Perth Football Club change rooms.
The triple Sandover Medal winner is being sued for damages over the alleged abuse that the victim says started in the late 1960s when Cable was at the height of his playing career.
"Barry always complimented me about my body," she told the District Court of Western Australia civil trial on Wednesday.
"Barry would always talk about himself and how good he was. He would always tell me how lucky he was to know him."
The woman, who cannot be named for legal reasons, says she was often at the Cable's family home and the abuse started with the footballer exposing himself to her and asking questions about her sexual experience.
"Barry went on to say he would teach me about life, the bird and bees stuff so I would be a hit with the men," she said reading from a statement to police in the late 1990s.
Cable, who was not in the court and never charged, allegedly told his victim that it would be good for her and that she would eventually thank him for the experience.
"He would comment on my big breasts," she said.
"Eventually he got me to touch his penis. He used to call to his totem pole."
The woman said the "second phase" of the abuse started in 1969 when Cable allegedly taught her about masturbation.
"He always perspired a lot and made groaning and grunting noises," the woman said.
She also accused Cable of forcing her to give him oral sex in a car and said his breath smelled bad.
"He also used to push my face into his armpit and say this is what real men smell like," she said.
The woman said Cable also forced to her to have sex at a public pool where he worked.
"Barry used to say it was our secret," she said.
The woman said the abuse caused her to start binge-eating and using laxatives leading to a lifelong medical condition.
She also said the interactions frightened her and caused her to hate herself, but Cable made it sound like he was doing her a favour.
"Barry used to say how good it was for me to have me as his coach," she said.
She started sobbing as she recalled how Cable threatened to "prey upon" her sister if she did not co-operate with him.
Lawyer Tim Hammond told the court the abuse started when the woman was 12 or 13 and carried on for about five years.
"The abuse was constant, it was pervasive, it was degrading and circumstances when there was a complete power imbalance," he said.
He also said it left the woman with lifelong mental health challenges, including chronic stress disorder caused by the abuse.
A judgment released on Tuesday revealed Cable had recently been declared bankrupt and intended to take no further part in defending the proceedings other than relying on written material already provided.
Cable had made several unsuccessful attempts in recent years to have the proceedings permanently thrown out.
One of football's most decorated players, Narrogin-born Cable was in 2012 elevated to legend status in the Australian Football Hall of Fame.
He had an illustrious playing career for Perth and East Perth in the WAFL and North Melbourne in the VFL, going on to coach in both leagues.
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