Casey Donovan has revealed the shocking extent of her former best friend's manipulation, after the singer was cruelly 'catfished' for six years.
The Australian Idol star first confessed in 2014 that she fell in love with a man named 'Campbell', only to find out he didn't exist and was invented by her friend Olga.
And she confirmed on Andrew Denton's Interview program on Tuesday night that Olga once used her elaborate web of lies to coerce Casey into having sex with her.
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'I was just willing to do anything to see him': Casey Donovan (pictured) has revealed she had her first sexual experience with the friend who cruelly catfished her for six years
'I think by that time I was just willing to do anything to see him,' the 30-year-old said, reflecting on her harrowing ordeal.
Casey, who identifies as straight, explained how 'Campbell' had asked her to have sex with Olga, and then tell him about the encounter afterwards over the phone.
Desperate to finally meet her fictional boyfriend, the young songstress agreed to the bizarre request. It was her first sexual experience.
She said: 'My intuition was saying, "This isn't right, don't be a d**khead". But I'd put so much time in this that he had to be real.
'The sexual encounter with Olga… [Campbell] was like, "Do that, then we'll all get together and do that together".
'But um… it was a seed. It was planted… We were in her room and then [Olga] just kind of tried it on and I was like, "Oh, this is happening" and then, "Oh, that happened".'
'I convinced myself that he was real': Casey fought back tears as she told Andrew Denton (left) about the six-year ordeal on Channel Seven's Interview on Tuesday night
'It was weird and I was…' she added before trailing off. 'It really stuffed with my head. There were so many things happening, I didn't know which way was up.'
Reflecting on Olga's motivation, Casey said she wondered if her friend was driven by repressed sexual desire.
'I don't know if she was a closeted lesbian that didn't understand her sexuality so she tried to make other people
