Brandi Glanville lived through every parents worst nightmare Saturday when she lost her son Jake while shopping, RadarOnline.com is exclusively reporting.

The newest member of The Real Housewives of Beverly Hills cast was in a very un-Beverly Hills store, Walmart, when the incident occurred.

Glanville had both her kids from her marriage to Eddie Cibrian -- Mason, 8, and Jake, 4 -- with her when she suddenly realized the younger boy was missing.

"She was going through the electronics section, pushing her cart, when she suddenly turned around and saw that only Mason was following her," an eyewitness tells RadarOnline.com exclusively.

Brandi Glanville has told RadarOnline: "I'm fine with Eddie and LeAnn getting married."

Glanville -- who has two sons Mason, 7, and Jake, 4, with CSI Miami star Eddie Cibrian -- claims she was "not fazed" when she heard he married his ex-co-star LeAnn Rimes in a 'hush-hush' sunset ceremony in Malibu on Friday.

PHOTOS: LeAnn Rimes And Eddie Cibrian Tie The Knot

Brandi Glanville has told RadarOnline.com that she "knows nothing" about a reported new reality show starring her ex-husband Eddie Cibrian and his fiancée LeAnn Rimes.

PHOTOS: Eddie Cibrian & LeAnn Rimes Step Out In WeHo

Rumors have been circulating that the pair are in discussions to do a new show about their lives as newly weds which would also feature Glanville and Cibrian's two sons Mason and Jake.

Brandi Glanville has told RadarOnline.com that she "knows nothing" about a reported new reality show starring her ex-husband Eddie Cibrian and his fiancée LeAnn Rimes.

PHOTOS: Eddie Cibrian & LeAnn Rimes Step Out In WeHo

Rumors have been circulating that the pair are in discussions to do a new show about their lives as newlyweds and that the show would also feature Glanville and Cibrian's two sons Mason and Jake.