If only Alexis Bellino had sent her regrets. The Real Housewives of Orange County star had a very, very bad girls' night out when she opted to attend an intimate dinner party hosted by nemesis Tamra Barney. As loyal watchers of the Bravo smash know, the dinner, held at Barney's new CUT Fitness studio, immediately devolved into ugly chaos -- with the long-estranged Bellino and Barney at the center of a heated argument. Barney eventually forcibly removed Bellino from the premises, telling her the "get the f--- out," with Bellino's allies Vicki Gunvalson and Lydia Stirling-McLaughlin later defending her to Barney and the rest of the women.

"I definitely regret going to Tamra's party," Bellino, 35, told Us Weekly during a recent visit to our NYC offices. "Who wouldn't?!?" Reluctantly accepting pal Gunvalson's extended invite, the mom and fashion designer explains, "I went with pure intentions, with the hopes that everyone was ready to move on . . . I just went in open minded, and I got the door shut in my face. Which is okay!"

Indeed, after an intense season seven, Bellino seriously considered walking away forever from the show. "I really did quit," she admits to Us. With things reaching their breaking point during a girls' trip to Costa Rica, "I had a rough year last season," she says. "I was just really down and in a sad place."

What changed her mind? A phone call -- and her kids. "I wanted to show them their mom's a fighter," Bellino explains.

For much more from Bellino -- including her slightly catty quip on Gretchen Rossi's engagement to Slade Smiley -- watch the video now!