First Look: Beyoncé's Secret Sister Reveal! Little Koi Is Now 4 Years Old As Her Mother, Taqoya Branscomb, Opens Up About Her Affair With Mathew Knowles

Taqoya Branscomb says her 4-year-old daughter is Beyoncé’s half-sister. In a new interview, airing Thursday, Oct. 30, on Inside Edition, Branscomb will sit down with Diane McInerney exclusively and tell everyone that her daughter, Koi is the result of an affair between Branscomb and Beyoncé’s father, Mathew Knowles, and that just like Beyoncé, Koi Knowles is growing up in Houston, Texas, with a passion for singing and dancing.

Branscomb tells Inside Edition that when she became pregnant, Knowles said the child couldn’t be his.

Branscomb: “He’d had a vasectomy. Or at least that was what I was told.”

But she showed Inside Edition the results of a court-ordered paternity test that states he’s the father by a 99.9 percent certainty.

Branscomb: “You can’t deny it once DNA tests come out 99.9 percent that you are the father.”

Branscomb tells Inside Edition that Knowles has not financially supported Koi and that she’s battling him in court to get him to pay child support. But despite her differences with Mathew Knowles, Branscomb says she hopes one day Koi will be able to meet Beyoncé.

Branscomb: “They are half-sisters, and maybe one day down the line that can be made possible.”

Besides Beyoncé and Solange, MStars News wonders if little Koi will also get to meet her half-brother Nixon Knowles one day ...

Inside Edition has reached out to Mathew Knowles, but has not received comment at this time.

For the full report, tune in to Inside Edition Thursday, Oct. 30.