According to docs obtained by WCNC, Paula Cook filed for child support against her estranged husband Antwaun Cook last week and cited an alleged affair between Cook and Barrino. She claims the two met at a T-Mobile store and, beginning in August 2009, began their "covert adulterous affair."

Cook goes on to claim, "Throughout the course of their adulterous affair ... Defendant/Husband and Ms. Barrino have at times recorded their illicit activity."

Rumors of an affair between Barrino and Cook have been around for months -- and Barrino has always denied them.