Orange County Housewife Kelly Dodd is denying that she had ever had a threesome after Vicki Gunvalson continues to try and run her name into the mud.

"This is absolutely ludicrous. I've never done a threesome, let alone a train," Kelly said in the recently aired episode.

According to Vicki, Kelly takes cocaine, and has been involved in a "sex train," which is wild.

"So first of all, Vicki is a liar. She lied about cancer — the worst thing you could possibly lie about. The lady is dangerous," Kelly told her castmates Braunwyn and Gina.

The ladies had planned to keep quiet about the rumor, but Kelly's pal Braunwyn let her know - as any good friend should have.

"We had a code of silence that none of us were going to talk about the choo choo train. Tamra, Shannon and I discussed it, and I said, 'Nothing good can come from this. This is all going to be super damaging,'" Vicki said last week. 

Is this what led to the epic falling out of Kelly, Tamra, and Shannon? It might just be!