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Denise Richards, Charlie Sheen

PacificCoastNews.com; Isaac Brekken/WireImage.com

Charlie Sheen is shocking Twitter followers yet again with his latest rant.

This time, however, it's unfortunately directed at his ex-wife Denise Richards who is also the mother of two of his kids.

It started Sunday afternoon when Sheen reportedly began his rant tweeting, "Brooke M is a sexy rok star whom I adore D Richards a heretic washed up piglet Shame pile Happy Father's Day!!!"

Brooke M likely refers to his third ex-wife, Brooke Mueller. The couple also had two sons together who were once in Richards' custody.

Charlie Sheen

CBS

The tweets only got worse when Sheen wrote a long "open letter to the media" where he bashed Richards by calling her the "worst mom alive" and an "evil terrorist." All of the controversial tweets have since been deleted but his "open letter" can still be found online.

E! News has reached out to Sheen's camp for additional comment. 

While Sheen may not be displaying model behavior, Richards appears to be killing her ex with kindness as she headed to Twitter with her own message.

"Happy Dad's Day! @CharlieSheen have a great trip in Mexico!" she tweeted. "Kids were disappointed u weren't here for it—Hey we'll celebrate when u r back!"

When one fan asked if Mexico is a "work related trip," she simply replied "nope."

This isn't the first time Richards has had to respond to the Anger Management star's messages on Twitter. Last Christmas, Richards responded to allegations by her ex that she was keeping him away from the family celebrations.

"@CharlieSheen U done ranting? Keep it classy dude," she shared. "Our kids don't need to be privy to this, U are welcome 2 spend xmas w/ us Hope u still come."