Lala Kent may not have been featured on the latest episode of "Vanderpump Rules," but the former reality star was a hot topic for her co-stars. After being a no-show to Ariana Madix's birthday celebration in Sonoma, California, and failing to explain why, Kent's co-stars spoke of her failure to join them on their trip -- and of her mysterious relationship with her unidentified boyfriend.

On Twitter, after watching Monday night's new episode, Kent poked fun at her co-stars for making the show all about her -- despite having quit weeks ago. "How was I not in last nights episode, yet I was the only one in last nights episode?" she asked her fans and followers.

Lala Kent joined 'Vanderpump Rules' during season four

After Stassi Schroeder took on a reduced role during that season, Kent joined the Bravo reality series after being hired as a hostess at Lisa Vanderpump's SUR Restaurant, where the series is based. Although Kent seemed to hit it off with a few of her co-stars right away, she ultimately got caught in the middle of the drama after she and Jax Taylor were seen flirting with one another at a restaurant. Kent then returned to the series for season five with just one ally in the cast: James Kennedy.

Lala Kent is rumored to be dating a married man

Throughout the 5th season of "Vanderpump Rules," Kent has been accused by several members of the cast, including Katie Maloney, Stassi Schroeder, and Jax Taylor, of dating a married man.

However, Kent has vehemently denied that her mystery man is married and his identity has not yet been revealed.

During Monday's show, Vanderpump and Kennedy were seen speaking of Kent's mystery man and during their conversation, Kennedy seemed to hint that the unnamed man was controlling of Kent's day-to-day activities and had actually led Kent to fear him.

Meanwhile, Vanderpump expressed her concern for her employee.

To see more of Lala Kent's co-stars, tune in to the remainder of "Vanderpump Rules" season five, which airs on Monday nights at 9 p.m. on Bravo TV.