De Barge who made an appearance at his daughter, Kristinia's show, "Growing Up Hip Hop," was confronted with hard questions from her and the 53-year-old held fast to his claims, Daily Mail reports.
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In response to his daughter's questions about who could be her half-sister, De Barge said:
"I'm tired of the secrecy. I'm tired of the truth not coming forward, and people being a coward when it comes to it. And I thought it was wise for me to speak out now because it needs to be addressed.
"To be honest with you, I didn't know. I was under the impression that there was no baby, and I wanted to believe it's not true. But it is."
Earlier this year, Radar Online reported that DeBarge had made claims of a secret child between himself and Janet.
He went on to claim that he had contacted the woman claiming to be the daughter Janet hid from him in her teens and allegedly gave up for adoption.
The singer, who was part of the band DeBarge, married Janet in 1984 but their marriage was annulled in 1985.
After serving three years in prison for assault with a deadly weapon and drugs charges, De Barge was released in 2015.
Meanwhile, Janet has remained mum on the claims, neither confirming nor denying them.
She is currently expecting her known first child with billionaire husband, Wissam Al Mana.