Charlie Sheen took to Twitter on Monday to talk about how much he dislikes his ex-wife, Denise Richards.

The actor tweeted a poem over the weekend in response to Duck Dynasty star Phil Robertson's anti-gay comments in an interview with GQ, in which he compared homosexuality to beastiality. Sheen again this week slammed the Robertson family matriarch, but brought his ex-wife's name into the mix.

Richards reponded to the comment by saying that he should think of their children before acting in the future. She tweeted Monday, and then deleted, "@charliesheen U done ranting? Keep it classy dude. Our kids don't need to be privy to this. U are welcome 2 spend xmas w/us. Hope u still come."

The harsh exchange between the exes come after Richards allegedly canceled their holiday plans together with their daughters -- Sam, 9, and Lola, 8. She told her ex-husband that he was not welcome to join her and the girls during their Christmas travels, according to TMZ.

"The lie is over. I'm done being treated like a relative with a one-way ticket. #DuhNeese," Sheen tweeted Dec. 15, along with a photo of a baseball bat the couple received as a wedding gift chopped into pieces.

New York Daily News reported that when a Twitter follower asked Richards why Sheen could not join her and her girls for Christmas, she tweeted, "That's actually not true. I don't know why he feels the need to do this publicly. I don't keep him away from our kids."

She also added, "Emotionally: I'm done. Mentally: I'm drained. Physically: I smile."

Tags: Charlie Sheen denise richards phil robertson Duck Dynasty