While her ex-husband Eddie Cibrian** is vacationing in Cabo San Lucas, Mexas with new wife LeAnn Rimes, Brandi Glanville** is spending quality time with their kids.

But it sounds like Glanville's son Mason, 9, and Jake, 5, will soon be spending more time with their dad -- and the Real Housewives of Beverly Hills star, 40, isn't too happy about it.

"Ok I'm super excited my kids are moving into a mansion," she tweeted Jan. 3, "but I want to throw up in my mouth and swallow it -- having to keep hearing about it."

Rimes, 30, has been tweeting about her vacation home in Cabo with Cibrian, 39. "We love our home!" she tweeted Dec. 30. "Esperanza Resort. Cheers to 2013."

Back in L.A., Glanville was photographed makeup-free while running an errand with sons Mason, 9, and Jake, 5, at Walmart on Monday, Dec. 31. The boys were snacking on McDonalds while walking through the parking lot.

"Just saw pics [of] the boys and I online at Walmart. No, I wasn't wearing makeup, and no, I don't have cheek implants. But yes, we do eat fast food sometimes." She added, "I don't wear makeup to Walmart and I haven't had surgery on my face . . . Yet."

In a Jan. 7 episode of Real Housewives of Beverly Hills, Glanville is still coping with Cibrian's affair with Rimes -- and another one of his alleged mistresses, Scheana Marie.

When the single mom confronts Scheana, 27, she tells Us Weekly she turns "into a crybaby!"

"I wish Eddie married Scheana instead," Glanville says. "She seems more sane!"

This article originally appeared on Usmagazine.com: Brandi Glanville Wants to "Throw Up" Over Talk of Eddie Cibrian, LeAnn Rimes' Mansion