In case you haven’t heard, Lisa Vanderpump of Real Housewives of Beverly Hills celebrated her 53rd birthday on September 15. To honor the special day, Lisa’s daughter Pandora decided to throw a little shindig. Sounds perfectly harmless and drama-free, right? Not in the world of RHoBH.

Rumor has it none of Lisa’s fellow RHoBH cast-wives were invited to her party — which, of course, has us asking all kinds of questions. The gossip on who made the invite list really got going when Pandora shared a photo from the event.

Credit: Pandora Vanderpump on Instagram

“Silly fun celebrating @lisavanderpump’s birthday in the olive grove! #ohbruno #latergram,” she captioned the image — an image in which none of the Housewives are pictured or even mentioned. So what happened? Did their invites get lost in the mail?

As if.

Pandora explained the situation via Twitter on October 3: “FYI @allabouttrh I arranged @lisavanderpump 's birthday party and I invited people who love her and make her happy #sothreeweeksago.”

People who love and make her happy, huh? Does this mean Lisa and Brandi Glanville are definitely not past the “hiccup” in their relationship? And what about the other women? Is Lisa on the outs with all of them? Guess we’ll have to tune in when Real Housewives of Beverly Hills fourth season returns November 4.

SourcePandora Vanderpump on Twitter

Elisabeth Kramer is an Assistant Editor at Wetpaint Entertainment and our resident Downton Abbey expert. Follow her on Twitter and Google+!