American Idol winner Fantasia Barrino is denying, via her manager, accusations that she is responsible for ending the marriage of a married man.

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According to a report, Paula Cook, of North Carolina, is alleging that Barrino engaged in a "covert adulterous affair" with her husband Antwaun, causing the pair to separate in June. On Wednesday, Cook filed a petition for divorce in Mecklenburg County District Court and is seeking child custody, alimony and other monetary support.

In the court documents, Cook alleges that Barrino treated her husband, a T-Mobile store employee she met in August 2009, "to a lavish lifestyle makeover over the course of their affair." Cook goes on to allege that the couple "at times recorded their illicit sexual activity."

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Without specifically denying the affair, Barrino responded to the allegations for the first time on Monday. "Fantasia is certain that she is not responsible for the deterioration of the Cook's marriage," Barrino's manager Brian Dickens said in a statement. "Fantasia will weather this Storm with the dignity and grace that she has exemplified throughout a life in which she has repeatedly overcome obstacles and challenges."

The 26-year-old singer has been photographed with Cook, whose name she has tattooed on her upper left shoulder. News of the possible affair began circulating in November.

Barrino recently reprised her starring role in the Los Angeles production of Broadway's The Color Purple. Her new album, Back to Me, comes out Aug. 24, and the second season of her VH1 reality show Fantasia for Real returns on Sept. 19.