Kent revealed in a behind-the-scenes clip that she decided to confront the SURvers after hearing what they were saying behind her back all season.
"My goal today is to just let them know enough is enough," she told the camera in a confessional before surprising the cast at the filming.
"We're grown adults," she added. "Stop bullying people. Stop being mean. Like enough with the mean girl stuff. It's played out. Your mom should have told you that."
She admitted that she was "nervous" as she started getting ready, but still found time to get sassy with her glam squad.
"I wanted my look today to be like 'don't mess with me b**h' but like kind of soft as well," she described.
The sneak peek then cut to Andy Cohen, who made the bombshell announcement that Kent would be "joining the party."
"She's in New York," Scheana Shay whispered with a puzzled look.
"Excuse me?" Cohen quipped. "Do you not know who that is?"
"I just knew yesterday she was in New York," Shay responded.
"Oh, well she's in Los Angeles today," Cohen confirmed, as Kristen Doute whispered to Brittany Cartwright, "Doesn't 'quit' mean 'don't come back?'"
Radar exclusively reported that Kent, 25, joined the reunion shortly after filming wrapped.
"Scheana, Ariana Madix and Lala were all on the same side and took pictures together," a source told Radar at the time. "Lala is wanting to be with the girls."
Kent and Shay, 31, have since become best friends on social media.
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