Former I’m A Celebrity... Get Me Out Of Here! contestant Vardy - who is married to Leicester City footballer Jamie Vardy - lost her bid to sue Rooney for defamation in the High Court, with a judge ruling she knew the stories were being sold The Sun newspaper.
But Vardy, 40, has said in an interview for the upcoming interview: "'I wonder, how easy would it be to potentially set someone up in a way that makes it look like that is the only person that has seen those [leaked Instagram] posts?
"I just find it absolutely incredible to this day that she said no one else knew about this...
"The irony is that since I was removed as a follower, stories have been coming thick and fast about the Rooneys."
She added: "If I had been selling stories, where are the messages saying 'give this to The Sun'? 'Make sure I get paid for this'. Where are they? There aren't any - because they don't exist."
Watch: Rebekah Vardy calls out misogyny in the Wagatha Christie trial
During the High Court trial, Justice Steyn said; "The evidence clearly shows in my view that Mrs Vardy knew of and condoned this behaviour, actively engaging in it."
The reality TV star gives her side of the story in new documentary series Vardy vs Rooney: The Wagatha Trial, which will be streaming on Discovery+ from Saturday 19 November.
Vardy said: "I have zero tolerance for this bulls***... I just find the whole thing really f***ing bizarre."
Recalling the moment 36-year-old Rooney - wife of footballer Wayne Rooney - went public with her accusation on social media, Vardy said: "I felt physically sick. I think it must have been the biggest panic attack. I was totally shocked. What to do next? That's the million-dollar question."
She went on: "I couldn't understand why someone would do that. Why someone would do that knowing someone's vulnerable, knowing the impact something like that is going to cause. It's going to cause a s*** storm – a massive one – and that it did."
The high court has ruled that Vardy must pay 90 per cent of Rooney’s legal costs, amounting to a maximum of £1.5 million, after she was unsuccessful in her bid to sue her fellow footballer's wife for libel.
At the core of the trial was Coleen Rooney's public accusation that Rebekah Vardy’s Instagram account was the source of information leaked from her personal private account to The Sun newspaper.
Rooney announced on social media in October 2019 that she had narrowed down a list of suspects behind the leak to just one by gradually removing followers and posting fake updates until she declared the leaks came from Rebekah Vardy's account - hence the 'Wagatha Christie' nickname.
High Court Judge Karen Steyn ruled Rooney proved her claim was “substantially true” and that Vardy knew about disclosures to The Sun by her ex-agent Caroline Watt.