This week on "The Real Housewives of Orange County," Meghan Edmonds started a feud with Shannon Beador by not inviting her to her party, and the rest of the ladies decided which side to take in this latest development. 

The episode opened at Napa where Meghan berated Shannon for being rude to her on the phone. Shannon bristled at this and said that Meghan couldn't insinuate that she was being uncharitable. Meghan told her that she didn't even respond to her text message, and Shannon said that she has a private cell phone number. 

"You have a private phone number," Meghan said sarcastically. "Who do you think you are? The Queen of England?" 

This time, Shannon tried to apologize, but Meghan wasn't having it and said she didn't think that it was a genuine apology. 

Everyone was back in Orange County, and Meghan started planning her wine procurement party to benefit the Juvenile Diabetes Research Foundation. 

Tamra Judge, Vicki Gunvalson, and Shannon had dinner, and Vicki and Tamra talked about Meghan's party, but Shannon said that she had not received her invitation. Vicki told Shannon that she talked to Meghan, who told her that Shannon was not invited. 

Shannon took the news badly and thought that it was immature of Meghan not to invite her. She complained how she already got a dress and even made a hair appointment for the event. Luckily, she had Vicki on her side, and Vicki decided to stand by her friend and skip Meghan's party. 

On the day of the party, Heather Dubrow dropped by Meghan's place to ask her to think about her decision not to invite Shannon. 

"This is going to be a Defcon Four situation!" Heather warned Meghan.

But Meghan said that she was comfortable with her decision and that Shannon is unpredictable and can't control her emotions — she couldn't have that in her house. 

On the night of the party, Vicki took Shannon out to a bar where they had fun sampling an array of shots. Lizzie Rovsek called Vicki and Shannon from Meghan's party, and after hearing that they were having a good time, she and Tamra decided to tell Meghan about their plans to join Vicki and Shannon, and Meghan said that she was fine with it, no hard feelings. 

"The Real Housewives of Orange County" airs Mondays at 9 p.m. on Bravo.