Does Brandi Glanville have a third book in the works?

'RHOBH' Star Brandi Glanville Tells Her Co-Star To 'STFU' On Twitter

On Tuesday, the Real Housewives of Beverly Hills star took to Twitter, where she seemingly announced the title of her upcoming book, and dissed her ex-husband's wife, LeAnn Rimes, in the process.

"Okay so I'm thinking my next book is going to be called 2nd wife syndrome @y'allknowyouhaveit !! Let's break it down and out!! #imserious," she wrote.

Brandi Glanville, Kenya Moore & Kyle Richards Join Forces For Charity

As fans have heard, on multiple occassions, Glanville's ex-husband, Eddie Cibrian, left her for the country star, who he later married, in 2009. Since then, the reality star has been locked in a bitter feud with the singer.

Glanville's latest jab came just days after Rimes posted a message online about being a step-mother to Glanville and Cibrian's sons, Jake and Mason.

"Being a parent is the most rewarding yet challenging job anyone could ever have," the Instagram message read. "Happy Mother's Day to every kind of mother there is. To every woman who thinks they're completely screwing it up at any moment. To every woman who's giving it their all and loving from the deepest places in their hearts they never knew existed. I hope you're celebrated and appreciated not only today, but everyday. #proudmemberofthestepmomclub #happymothersday."

Although Rimes didn't diss Glanville in her post, many fans believed Rimes shared the message in an effort to get under the reality star's skin.