"I know your life exists solely for the purpose of living and creating drama," Eddie wrote in an email obtained by Radar online. "It's a sad way to live. It's so obvious that you have to constantly mention my wife [LeAnn Rimes] so people will care what comes out of your mouth."
Brandi confirmed to The Huffington Post that she received Eddie's email and has revealed the contents of the one she fired right back.
"I couldn't help myself," says Brandi. "I can't say too much, but Leann has a serious eating disorder and it affected my kids in the worst way. She needs major help -- no way will Eddie put up with this for too much longer."
In the email, Brandi reiterates her claims that LeAnn, among other things, is addicted to laxatives, has a "mental disorder," and needs to stay off of Twitter.
"My kids are my life," Brandi said to Cibrian in her emailed response. "However, ur wife is a [expletive] and addicted to laxatives that Mason got sick on ... Your 'close friends' talk s*** about u and ur wife ALL the time ... and [redacted] who was all too ready to spill on both of you ... lovingly refers to LeAnn as angelfish because she sings like an angel and drinks like a fish."
She continued, "You want to talk narcissism??? U two are both the best examples of that."
Representatives for Cibrian and Rimes did not immediately return requests for comment, but Marcel Periseau, a rep for Rimes, told E! Online, "Brandi keeps grasping at straws to make LeAnn seem like an unfit person. Brandi's story changes daily, one day it's an eating disorder, one day it's Twitter, one day the boys aren't safe, etc. She says she hasn't seen or spoken to LeAnn in months but yet knows everything that is going on. None of Brandi's allegations are true."
UPDATE: A rep for Cibrian tells The Huffington Post in a statement:
It is absolutely ridiculous that my ex-wife continues to put the personal lives of myself, LeAnn, our sons and my family on public display for the sake of her notoriety. She is fully capable and has the means of contacting myself and LeAnn privately to discuss any matter concerning the children. The fact she chooses not to, should be pretty transparent. And while I do not wish to fuel her ever-igniting fire, there is a breaking point where enough is enough. My wife, LeAnn, continues to be a loving and positive influence on the lives of my sons. If my ex-wife truly cared about the welfare of our sons, she would stop the constant bashing on an important person in their lives and focus on productive co-parenting to make our blended family the strongest it can be.