The Truth At Last! Brooks Ayers Films Secret Cancer Bombshell With Andy Cohen -- Why Vicki Gunvalson Is Terrified

After months of dodging questions and criticisms about his cancer diagnosis, Brooks Ayers could finally be ready to tell the truth once and for all. RadarOnline.com has learned that Vicki Gunvalson's ex-boyfriend has filmed a secret bombshell interview with Andy Cohen, which will air during the Real Housewives of Orange County reunion.

Ayers went to New York City earlier this month, and "Bravo paid for the plane ticket and five star hotel," an insider told Radar. "Andy interviewed Brooks about his cancer diagnosis and all of the questions surrounding it."

"Brooks didn't want to be at the reunion because he just didn't want to deal with the other ladies on the show, especially Meghan Edmonds," the source said.

But meanwhile, "Vicki was completely blindsided by Brooks' decision to do the interview with Andy," the source continued. "Complicating matters, Brooks isn't telling Vicki anything about the interview. She has no idea what was said, or if he threw her under the bus!"

Gunvalson's former lover has been accused of faking his non-Hodgkins lymphoma diagnosis and her family "wants him to take a lie detector test to prove once and for all that he has the disease," the source previously told Radar.

"Vicki thinks it's absolutely ridiculous that her kids doubt that Brooks has cancer," said the source. "But there has never been any proof provided that Brooks does have it. When her kids asked him to provide proof, Brooks just scoffed at their demand and has refused to take it."