Sources close to the British restauranteur told Us Weekly that the 53-year-old reality star is worried about how her fans will react to her appearance on the reality show.
"Lisa has been trying to spin everything in anticipation of the reunion not being good for her," the insider said. "She's scared and concerned that people's opinions of her might change. She might come out of this no longer as the queen."
Vanderpump reportedly confronts frenemy Brandi Glanville during the reunion over claims she made that she was near bankruptcy.
"Lisa brought it up immediately at the reunion because she wanted to play the victim," the source added. "No one hit below the belt, no one said something they shouldn't have said."
Vanderpump and Glanville went from being friends to rivals in the span of the current season of RHOBH. The latter addressed the fallout of their relationship while appearing on Bravo's Watch What Happens Live after Monday's finale.
Asked by a fan why she would bite the hand that feeds her -- Vanderpump partnered up with Glanville as she joined the reality show as a "friend of the housewives" -- Glanville said she's the one "who fed that bitch."
"I've been under your spell for two years," Galnville told her co-star during the finale. "Truth is, I'm stronger on my own. I don't ever want to be on the other side of your anger. With this fight, I finally feel free. I love you, but I'm not part of your game anymore."