Cardi B reacted to the news that her boyfriend, Stefon Diggs, is being sued for paternity by another woman - and seemed unbothered by the drama. "Hello, Barbara, this is Shirley," the Grammy winner, 32, said in a recent Instagram Live video, referencing Shirley Brown's 1974 song "Woman to Woman," which is about a woman calling her husband's mistress. "That's your baby daddy, bitch? That's my baby daddy too," Cardi continued while layering shredded cheese over a dish. "Well, what now? I don't f***ing know. We'll figure it out, bitch.