The woman, who goes by Mima and is located in the UK, came out last week and called Bruno a "deadbeat dad" and beggar.
Mima has been accused of lying by Bruno's family, who have now come out in support of him.
Nalongo Brenda Nakanjako Mboowa, Bruno's older sister, stated during a two-hour YouTube video that there is still uncertainty regarding the child's paternity.
Nonetheless, Mima has publicly said several times in private talks that the child is not Bruno's, according to Nakanjanko.
According to Nakanjako, Mima informed her via a WhatsApp conversation that singer Nubian Li, not Bruno, was the true father of her child and that she was prepared to provide DNA evidence to support this claim.
Nakankajo claims that Mima told Bruno K months ago that he wasn't the child's father.
The mother of Bruno's son, Vanessa Kirabo Atuhaire, came forward with shocking accusations of child neglect against the singer, and that's when she says Mima first contacted her in March of this year.
Mima was furious with Vanessa throughout their long WhatsApp conversations, according to her, calling her a “classless” and “clout seeker.” She also questioned Bruno's source of these kinds of women.
She pledged never to disclose her identity or her child to the public and declared she would never do something like that to her child's father.
Still, Mimi abruptly changed her story and began claiming that her child had another father when, months later in September, still another lady, Mariam "Dorah" Ssembatya, came claiming to be pregnant with Bruno's child, according to Nakanjako.