By Breaking Celebrity News Staff

Brandi Glanville lived through every parents worst nightmare Saturday when she lost her son Jake while shopping, Breaking Celebrity News 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 Breaking Celebrity News exclusively.

"She looked instantly panicked and asked Mason, 'where's your brother?' Mason said he thought Jake had gone to the bathroom, and Brandi looked even more frantic. She told Mason he was supposed to be keeping an eye on Jake."