The biggest secret of the "Real Housewives of Orange County" in season 11 has been exposed. Fans have been left hanging when it comes to what Vicki Gunvalson is holding over Shannon Beador's head. Vicki has made it crystal clear to the other women that she knows something about Shannon that she doesn't want out, but will use it to her advantage if they get into another nasty feud.

Star's secret is out

A source tells All About the Tea that Shannon's secret has to do with domestic abuse she's suffered at the hands of her husband, David. While its been reported that David was charged with assault and battery in 2003 for beating Shannon, the latest news is just as shocking.

The insider says David once beat Shannon so bad that it took her two weeks to recover from the injuries. Moreover, Vicki has photos that prove how severe Shannon's bruises were from that beating. Shannon has managed to hide her wounds from other beatings by going to tropical resorts to heal.

According to the source, Shannon Beador confided in Vicki Gunvalson about all of this information when their friendship was in a much better place. The status of their current frienship on the show is rocky at best.

Vicki threatened to reveal Shannon's dark secret to everyone else on multiple "RHOC" episodes before they headed to Ireland. The hush-hush topic hasn't been addressed since episode 14 due to the current drama surrounding other friendships that are falling apart at the seams. Vicki and Shannon haven't revisited their feud in recent weeks and are getting along for the most part.

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The big secret will be exposed on the show before season 11 winds down, however.

Shannon's secret will be revealed on 'RHOC'

Vicki has said all along that what she has over Shannon will hurt her family. When she first threatened to expose what she knows, Shannon acted as confused as anyone else about what Vicki was talking about. It's as though Shannon forgot she confided in Vicki about the domestic violence.

"The Real Housewives of Orange County" airs Monday nights on Bravo at 9 p.m., ET / 6 p.m., PT.