Francesca Amiker, the longtime radio co-host of Big Tigger, has filed a defamation lawsuit against his estranged wife, Alicia Brown.
According to court documents obtained by TMZ, Amiker claims Brown falsely posted on social media that she had an affair with Big Tigger and helped destroy their marriage.
Amiker insists her relationship with the radio host has always been strictly professional.
She alleges Brown's posts labeling her a "homewrecker" triggered a wave of online hate, damaging her reputation and costing her business opportunities.
She says she was forced to hire a crisis management team and is seeking unspecified damages.
The lawsuit adds to the legal troubles surrounding Big Tigger, whose real name is Darian Morgan.
He faces domestic battery and child cruelty charges after an alleged altercation with Brown at their Sandy Springs home in May.
TMZ obtained Ring camera footage that investigators say shows Morgan approaching Brown from behind, grabbing her by the neck, and struggling with her as she repeatedly yells for him to let go.
Police allege Brown was shoved into a door, suffering a deep cut above her left eye that required stitches.
Investigators also say the couple's 13-year-old son was inside the home and heard the altercation, leading to the child cruelty charge.
Morgan has denied the allegations. Brown has been granted a temporary protective order as the criminal case proceeds.