COVER STORY: 'Real Housewives of Beverly Hills' — Sisters Torn Apart By Secrets

The first season of The Real Housewives of Beverly Hills is over — but the battle between sisters Kim and Kyle Richards is still raging, with hurtful accusations and loved ones taking sides.

“Since the show, Kim and Kyle’s relationship has gotten worse. They’ve barely spoken,” an insider tells OK! in this week's all new issue. “This is the biggest fight they’ve ever had. Normally, an argument lasts a few days. This is different."

“Kim would usually be the one to back down first, but it doesn’t seem like she’s going to. This could definitely be a long feud.”

FOR MORE ON KIM & KYLE'S FEUD, PICK UP THE NEW ISSUE OF OK! — ON SALE EVERYWHERE THURSDAY!

ALSO IN OK! THIS WEEK:

Teen Mom 2: Leah Messer’s ex-boyfriend Robbie Kidd says he slept with the teen mom after her bachelorette party, only hours before she wed Corey Simms. In an exclusive interview, Robbie reveals what’s been happening behind the scenes, despite denials from Leah’s friends. Plus, the reasons Leah ended up choosing Corey.

Kourtney Kardashian: Is a wedding in the near future for Kourtney Kardashian and her baby’s father, Scott Disick? OK! readers debate on whether these two reality stars belong together.

Real Life: Updates on OK!’s recent real-life reports, including the search for the missing Morenci, Mich., boys, the impending mental competency trial for Jaycee Dugard’s captor and more information on the 13-year-old Texas cheerleader who disappeared.

Katie Holmes: According to insiders on the set of Katie Holmes’ new movie Jack and Jill, the actress got upset when she heard rumors about audience members walking out of one of her films. The worst part? The rumors weren’t true! Plus, more on the unfair career jabs Katie has had to deal with lately.

OK! Style Week: In a Grammy Preview Special, readers reveal their Grammy style favorites, Ciara talks about her music and OK! lists the stars trying to out-Gaga Lady Gaga. Also, a Valentine’s Day gift guide and the best Valentine’s Day date-night outfits, inspired by star couples.

Plus: Inside Bachelor Pad co-host Melissa Rycroft’s nursery; The latest photos of stars’ snow days; Experts debate the appropriateness of American Idol’s Chris Medina, who brought his recently brain-damaged fiancée to his audition; OK! picks the three most romantic dates from The Bachelor and The Bachelorette, including trips to Bora Bora and Seattle; E! News host Giuliana Rancic dishes on the best-dressed stars at the Screen Actors Guild Awards; Celebrity nutritionist Keri Glassman weighs in on actress Brooklyn Decker’s daily diet; And, just in time for Valentine’s Day, five seductive-makeup tips from the Victoria’s Secret Angels!