Vicki Threatens To Expose One Of Shannon's Dirty Secrets: 'You're A Liar!'

This week it's all lies, spies and vengeful 'Wives! On The Real Housewives of Orange County, Meghan King Edmonds threw a party to celebrate the grand opening of her candle store, but tensions ran high when Vicki Gunvalson called Shannon Beador a liar and threatened to expose a new secret.

"I am not a liar!" Shannon raised her voice in the middle of the event. "Tell me what I've lied about."

"If she keeps pushing me, I might bring out the little secret she doesn't want anyone to know," Vicki told cameras during confessional.

Sadly, things weren't looking promising after they dubbed one another as "difficult."

Watch the Video on RadarOnline.com:

Across town, Meghan and husband Jimmy faced new pregnancy difficulties.

"The baby is messing with me big time. . .and making me depressed," she confided in him. "Have you ever heard of women getting depressed during their pregnancy?"

"No," Jimmy answered plainly, a typical response for the athlete. Luckily, because Meghan was no stranger to battling depression in the past, the blonde beauty seemed ready to take on her new challenges.

Later, Heather threw a fancy party filled with feuding and cocktails to celebrate the release of her book. While everyone expected Vicki and Shannon to have it out in public again, it was Kelly who took the spotlight, calling Michael "a drunk" and "embarrassing."

"I can't take him out anywhere!" she told Vicki angrily when he began "harassing" another party goer.

At the end of the night, Meghan suggested a girls' trip to Ireland to investigate her heritage — but RadarOnline.com smells trouble on that international getaway.