The former sex worker at the centre of allegations against federal MP Craig Thomson tonight recanted her story that she had slept with him while he was at the Health Services Union — and accused the Nine Network of misrepresenting her.

The woman tonight apologised to Mr Thomson and his family, and argued it had been a case of mistaken identity. "I feel absolutely terrible for Craig Thomson and his family."

"I'm totally unsure" ... a prostitute has told Channel Seven that she doesn't know if she slept with Craig Thomson.

The woman was in negotiations with the Nine Network's A Current Affair program, which had tracked her down, secured a sworn statement, and offered first $50,000, then $60,000, for an on-camera interview.

Tonight she fronted the rival Seven Network Today Tonight program to say she had not slept with Mr Thomson, and would retract her sworn statement to that effect.