By Alexis Tereszcuk - Breaking Celebrity News Entertainment Editor

The bitter, and very public, battle between Brandi Glanville, her ex-husband Eddie Cibrian and his wife LeAnn Rimes has blown up to epic proportions with accusations of eating disorders, drug abuse, boozing and bad parenting being thrown around, and Breaking Celebrity News can exclusively reveal how and why the warfare started.

"People around Brandi started getting vocal a few weeks back about their worries concerning her parenting of the boys," a source close to the situation tells Breaking Celebrity News.

PHOTO: LeAnn Rimes & Brandi Glanville -- BFFs?

"Numerous different people told Brandi that they were concerned that when she had her sons with her she wasn't paying enough attention to them and was distracted with everything else going on in her life."

Brandi and Eddie have joint custody of the boys, Mason and Jake Cibrian, but the Real Housewives of Beverly Hills star has been adamant lately that she doesn't want the children around LeAnn because she claims she is "unstable."