After many years of speculation, Bunkie King has finally laid to rest rumours about the nature of relationship with Australian actor Jack Thompson and her older sister, Leona. Ms King shocked and intrigued the Australian public when she entered into a relationship with Thompson, who was twice her age, while he was also involved with Leona – who is nicknamed Le. The 60-year-old’s first meeting with Thompson was when she was 15 years old Sydney school girl, and has now revealed the salacious details of their 15-year affair and unconventional arrangement. Scroll down for video . Bunkie King, 60, has revealed how her three-way relationship with Australian actor Jack Thompson and her sister worked . Ms King, also appeared with Thompson in 1975 movie Scobie Malone, had a 15-year affair with the womanising actor . Speaking with A Current Affair about her book, Somebody I Used to Know: Love, Loss and Jack Thompson, Ms King said she decided to pen a novel during an argument with her son. At one point, he shouted: 'I'm not proud that my mother had sex with her sister.' This was the moment Ms King realised there were many misconceptions about her relationship with the womanising actor. 'That really shocked me because that wasn't our relationship,' she said. 'It never entered my head [that's what people thought], so I put it down warts and all.' Ms King, who has two children with her ex-husband, also revealed how she shared one man with her sister, 20. A young Bunkie King pictured here with her sister Leona - nicknamed Le - and Jack Thompson . Le (pictured left) was 20 years old when she started a relationship with the Australian actor . Jack pictured in 1980 (left) and 2013 (right), was written about under the headline 'Jack and his Jills', when he told a newspaper he felt 'like a bone being fought over by two dogs' But from the start the siblings made it clear they were not going to sleep with him in the same bed. When Ms King first moved in with Le and Thompson she was 'allocated one night a week' with the actor. But then they relocated to Collaroy - on Sydney's North Shore - and the sisters would see him on alternating nights. Ms King said she had never close to Le and there were times where she felt her sister, who she is now estranged from, wished she had Thompson all to herself. But it was all or nothing with Thompson, who starred in Spyforce - an action series following Australian Military Intelligence operatives in the South West Pacific during World War II. 'I was happy for whatever crumbs came off the table. It did cause problems with jealousy and things like that. I don't think either of us would have chosen it that way,' Ms King said. Cleo magazine featured him reclined naked on a sofa catapulting him to sex symbol status overnight . Talking to New Idea, Ms King said their relationship in many ways was 'quite old-fashioned'. 'We had separate bedrooms. He was just sleeping with both of us,' she said. In her interview with ACA, Ms King said her relationship was not a 'unique situation'. 'It is in western society but it's not a unique situation for a man to have more than one wife,' she said. 'In western society, a man generally speaking has a wife and a mistress or maybe a couple of mistresses.' But despite his commitment to two women, Ms King claims Thompson still had time to be unfaithful to her and Le. She said what hurt her the most about his alleged infidelities was the fact he was not open, honest and upfront about it. Ms King also revealed her sister did not know about her regular afternoon visits from Thompson at their mother's house when he started to court her. The visits in the 1970s increased  to three a week and, after months of spending time together, she fell hopelessly in love knowing he was with Le. Ms King has revealed in her memoirs how, as a virgin, she struggled to dampen her feelings for the blond tanned hunk and desperately craved his love even after her sister caught them kissing. Heyday: The actor, pictured centre (moustache), starred alongside David Bowie (right) in 1983 movie Merry Christmas Mr Lawrence . Seventies hit: The star (right) was catapulted to fame for the series Spyforce, based on the adventures of Australian Military Intelligence operatives in the South West Pacific during World War II . Ms King writes: 'One night, he and I are kissing and cuddling in their bedroom when Le [Leona] bursts in the door yelling, "What the hell are you doing?" 'He jumps up off the bed and tries to calm her down. I bolt out of the room, down the stairs, through the front door and out into the street. 'I know there's something wrong with what we've been doing. He's obviously Le's boyfriend and I feel bad for her, but I don't know how to give him up.' It was the same for Jack too and, with his popularity at its height in the mid-1970s, the Wake In Fright star bought a rambling farm in the hills above Coffs Harbour, on the NSW mid-north coast, and convinced the sisters to share an 'open' and 'honest' relationship with him. New Idea magazine is on sale now . They moved in together, Ms King confined to the smaller room, while Leona shares the master bedroom with the actor, now dubbed 'Jack The Lady Killer' by the media. In her book, the 60-year-old also speaks frankly about her drug use, ranging from marijuana to acid to heroin. But she did not classify her drug use as 'hardcore'. 'Hardcore to me is someone who is basically mainlining. It was the 60s and the 70s,' Ms King said. During the early years of their relationship, Cleo magazine featured Thompson reclined on a sofa in a pose emulating a classic nude, Titian's Venus d'Urbino, catapulting him to sex symbol status overnight. In 1972, Ms King evealed she fell pregnant for the first time, having forgotten to take the Pill, and underwent the first of three terminations over 15 years. As Jack's fame grew, journalists clamoured for details about the nature of his threesome relationship and in October 1974, he granted Sydney's Daily Telegraph an interview. Published under the headline 'Jack and his Jills', he claimed that he occasionally felt 'like a bone being fought over by two dogs.' The truth, however, no doubt lies somewhere in between. Ms King says a serious showdown in Spain forced her to finally flee and maintains throughout her 15 years as Jack's lover, she never knew if she was genuinely wanted or was 'just an interloper.' Today she works in nursing and is divorced with a son Stephan, 17, and daughter, and lives a quiet life south of Sydney. And for his part, Jack remains with Leona, with whom he shares a son Billy, and the pair lead a reclusive life in Ulong in New South Wales.
Bunkie King was a 15-year-old Sydney schoolgirl when she met the actor .
Jack Thompson was twice her age and they had a 15-year relationship .
During this time, Ms King was also involved with her older sister, Leona .
The 60-year-old has two sons with her ex-husband and works in nursing .
Thompson and Leona are still in a relationship and live in regional NSW .