Kim and Khloé Kardashian Alberto E. Rodriguez/Getty; Ethan Miller/Getty

Courtesy Peta

It looks like blood is thicker than flour.

After Kim Kardashian got pelted by a flour bomb, the anti-fur group PETA not only pledged to support the alleged attacker if Kardashian pressed charges, but lashed out at the reality starlet.

Now her sister Khloé is fighting back. Once so strong a supporter that she posed nude for a PETA ad, Khloé announced Monday that she's quitting the organization.

"I just received word that the woman responsible has very close ties to PETA, despite PETA publicly stating otherwise," Khloé writes on her blog. "Not only has PETA lied to the public, but they have proved that they support this kind of behavior."

She adds: "I’ve been a vocal supporter of PETA for a long time but I have also been very vocal about anti-bullying, so this was a huge disappointment for me. As you all know, I don’t condone violence and bullying and what happened last Thursday was just that."

Kim has still not said whether she plans to press charges against the alleged attacker, reported by TMZ to be a longtime militant member of PETA who once was given an award by the group.

Although denying being responsible for the attack, PETA says it would help the suspect if she were prosecuted.

"I am absolutely disgusted by their behavior," writes Khloé. "Everyone is entitled to their own beliefs and opinions – I personally don’t wear fur but that doesn’t mean I am going to force my views on anyone else, ESPECIALLY by violating them."