In pictures published today, the Two and a Half Men star can be seen in a car with a mystery blonde who bears a "remarkable resemblance" to Sara Leal, the woman reportedly demanding $250,000 (£160,000) to bury details of their recent 'fling'.
The images were taken outside a hotel in Los Angeles back in June, according to The Sun.
Leal claimed that she had slept with Kutcher after partying with him at a San Diego nightclub on Saturday - the date of his sixth wedding anniversary with Moore.
She has since been "talking to multiple media outlets" about a deal for her story, the New York Post reports.
"She wants $250,000, but the offers haven't been as high," a source said. "What she really wants is to get a pay-off from Ashton. She has reached out to Ashton's team."
Kutcher has adamantly denied reports of his infidelity and insisted that his marriage to Moore is still strong.
He yesterday posted a link on Twitter to Public Enemy's 1988 hit 'Don't Believe the Hype' in response to the speculation.
Watch Public Enemy perform 'Don't Believe the Hype' below: