Apollo Nida is well into his eight year federal prison sentence. But when rumors emerged that his wife, Bravo's The Real Housewives of Atlanta star Phaedra Parks, was cheating on him just days before he turned himself in, he snapped.

WATCH: Phaedra Parks Uncovers Apollo Nida's 'Erratic & Crazy' Behavior, Says He Threatened To 'Burn House Down'

In a trailer for the episode to air Sunday (Feb. 15), Nida confides in Cynthia Bailey's husband, Peter Thomas, about the speculation.

"She's having an affair with some guy," he then read text messages that seem to be from Parks to another man. In the message, Parks asks the mystery guy to be her "daddy."

WATCH: Apollo Nida Has Emotional Moment With Sons Just Before Prison, 4-Year-Old Ayden Says, 'I Want You To Come Back Now'

Nida then showed cameras that he had printed off the messages.

"The proof is in the pudding."

He went on to prove the messages were from Parks because she had sent the man a picture. Parks also shed light on just how bad Nida was taking news of her cheating as well as getting ready for prison.

"He said he was going to burn the house down. It's been like a nightmare on Elm Street."

Thomas also told Bailey about Nida finding out news of the alleged affair. Thomas admitted that Nida went "berserk."

Nida showed up at the home he and Parks shared together at the time. Given the threats that Parks said he made about ruining the house, it's no surprise she was already on edge when he popped up.

"Go away from me," she told him.

But that didn't stop Nida from going on a rampage around the home.

"I built this whole house. Stop playing with me Phaedra. You took everything from me!"

Take a look below and check out the full episode Sunday at 8/7 on Bravo.