Geri Horner (née Halliwell) will reportedly deny claims from fellow Spice Girl Melanie Brown, who publicly claimed the pair had "done it" during the girl band's heyday.
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In a recent interview on Piers Morgan's Life Stories, Brown, AKA Scary Spice, was asked about rumours she and Horner, AKA Ginger Spice, were "more than just good friends".
"You had a dabble?" asked Morgan.
"She's going to hate me for this because she's all posh in her country house with her husband," Brown replied.
"But it's a fact. It just happened and we just giggled at it and that was it."
The '2 Become 1' singer said said she hoped Horner didn't deny it if she was asked, calling it "just a fun thing".
Now, in a segment on his show Good Morning Britain, Morgan claims Horner is "briefing that it never happened."
"She's obviously slightly panicking about what Mr Geri thinks," he said.
The Daily Mail reports a source close to Horner says the interaction "never happened".
"We all know Mel B loves a headline. It might have been funny 15 to 20 years ago but it was over the top and not funny," the source says.
Meanwhile, video of an old interview has resurfaced in which Horner says given the choice between her band mates, she would "shag Mel B".
The Spice Girls are set to get back together for a reunion tour beginning on May 24 in Dublin.