Sharpen your claws, kitty cats – a new fight could be in the making. “Real Housewives of Beverly Hills” star Brandi Glanville celebrated her 41st birthday with fabulous food and friends, but who wasn’t there is what has people talking.

Fellow housewife, Yolanda Foster, wife of music mogul David Foster, was supposedly invited and ready to attend, but dropped out at the last minute.

Although this might not seem like a big deal, you may remember (or not) the two outspoken mamas recently had bad blood. You see, Glanville told Bravo producer and “Watch What Happens Live” host Andy Cohen that Foster’s marriage to her former husband Mohamed Hadid ended because of an alledged affair with “Real Housewives of Miami” cast member Joanna Krupa.

In fact, Glanville went so far as to discuss the lurid details of the so-called affair and revealed tidbits so juicy – and vulgar – that Glanville’s friend, and castmate, Lisa Vanderpump, spoke out against the model.

Watch what Glanville says about Krupa here:

Glanville, one of the newer members of the cast, is known as much for her outspoken nature as she is for her former marriage (her ex, actor Eddie Cibrian, left her for singer LeAnn Rimes.)

Glanville celebrates her birthday with Twitter posts.

My favorite people my favorite food @Flemings And I got Diamonds !! Happy scorpio day

— Brandi Glanville (@BrandiGlanville) November 17, 2013

Happy bday to me pic.twitter.com/HflU1fgXLl

— Brandi Glanville (@BrandiGlanville) November 18, 2013

Supposedly the two blondes made up and are good now, but judging by Foster’s absence, it looks like viewers will have more juicy episodes to watch in next season’s Housewives.

Image via Facebook