What a lot of viewers didn't know was that Tamra and Shannon were on the outs between when Season 13 wrapped and the ladies filmed the reunion. Tamra was still harboring a lot of the feelings she had during the season: She felt Shannon had become a selfish friend. They sorta-kinda patched things up, but the two took several steps backward during a girls trip to New York.
Tamra explained to Andy Cohen and the other 'Wives that during their trip, Shannon monopolized everything, made everyone stay at a more expensive hotel, and took advantage of Tamra's makeup artist, Melissa.
"I apologized right after!" Shannon insisted. "Mission accomplished. You were going to make me out to be the worst [person]."
"THIS IS WHY I CAN'T TELL YOU ANYTHING!" Tamra shouted across the room. "YOU ALWAYS TURN IT ON ME! 'Mission accomplished! You're doing what you're doing! You're making me look bad!' I'M TELLING YOU HOW I FEEL! THE THINGS THAT GET ON MY NERVES!"
Gina Kirschenheiter -- who's had her fair share of screaming matches with Shannon -- stepped in to try to speak for Tamra. She said she felt Shannon would get unjustifiably mad at Tamra for bringing their private matters to the show, when in fact, that's part of their job as reality stars.
That's when an aggravated Tamra let the cat out of the bag: "I get frustrated because she sits there and she's like, 'No, I'm not dating. I'm not dating.' You were dating a guy when we were filming!"
Shannon was a little thrown off by the comment but did admit to dating someone she "really liked" during the season -- something us viewers didn't know. But she quickly dismissed the relationship because said the man treated her "like crap."
But Gina was furious. During one of the episodes this season, the ladies spent a good amount of time trying to find Shannon a matchmaker. Gina, however, said she would have much rather spent that time with her kids if she knew Shannon was secretly seeing someone.
"You play victim a lot," Tamra chimed in. "You're like, 'David was dating three months after [the divorce]. He's dating. It's hard for me. It's so hard.' YOU WERE, TOO! You were dating, too!"
But Tamra wasn't done. "Your two favorite words are me and I," she continued. "Me, me, me, I, I, I, poor, poor, poor, victim, victim, victim. And sometimes, it [wears] on me!"
Tamra continued to go in on her friend, who was shocked for most of the exchange. She maintained that Shannon never asked her how Eddie was doing, and Shannon maintained that she was busy "going through flipping hell and back" dealing with her nasty divorce.
"I know," Tamra replied. "It's been four years, five years." Ouch!
"The Real Housewives of Orange County" reunion concludes on Sunday, December 9 at 9 p.m. on Bravo.