Shannon Beador claims Vicki Gunvalson lied during last night's season 10 finale of The Real Housewives of Orange County.

Shannon Beador Defends Herself Against Bad Friend Allegations

Although Gunvalson claimed to have told her brother's girlfriend, Rhonda, about Beador's husband's affair because her co-stars, Heather Dubrow and Tamra Barney, already knew, Beador said that wasn't the case, and Gunvalson didn't discover the news until after Barney's baptism.

Vicki Gunvalson & Shannon Beador's 'RHOC' Feud Explained: Why Did They End Their Friendship?

After watching the episode play out, Beador took to her Bravo TV blog, where she again claimed Gunvalson was lying about her decision to spread news of David Beador's affair.

"I would like to be very clear about this point. VICKI THOUGHT SHE WAS THE ONLY PERSON TO KNOW ABOUT DAVID'S AFFAIR AT THE BAPTISM. SHE DID NOT KNOW I TOLD TAMRA AND HEATHER DAYS BEFORE," Beador told readers. "She only found out I confided in Tamra and Heather days AFTER the baptism. Vicki betrayed my trust. Period. On the beach in Tahiti, Vicki said, 'I would never, ever betray you.' She did."

Gunvalson has not yet responded to Beador's tweet, or her blog.

For more Shannon Beador, tune into next week's Real Housewives of Orange County reunion, airing on Oct. 19 at 9 p.m. on Bravo, and to see her showdown with Gunvalson over her gossiping about David, check out the show highlight below.

Tags: shannon beador Vicki Gunvalson Bravo Reality TV The Real Housewives of Orange County