“Die Hard” star BRUCE WILLIS wants to “Yippie-kai-yay!” ASHTON KUTCHER for cheating on his ex-wife DEMI MOORE!

Willis, 56, believes Kutcher, 33, has dirtied his clan’s carefully culti­vated “hip” family image and made Demi, 48, look like a fool, sources say.

“Bruce is absolutely furious with Ashton for cheating on Demi,” a source told The ENQUIRER.

As The ENQUIRER recently reported, Ashton – the new star of CBS’ “Two and a Half Men” – partied naked on Sept. 23 in a San Diego hotel hot tub with a pair of young beauties and later bedded one of them in his $3,500-a-night suite – just one day before his and Demi’s sixth wedding anniversary!

“With Ashton at their side, he and Demi and their three daughters portrayed the perfect image of a modern family all living in harmony,” said the source.

“Ashton was basically the girls’ second dad. Bruce felt his family was in good hands with him, and they formed an unlikely friendship.

“But Ashton’s actions have completely destroyed their bond. Bruce thinks he’s shown a total lack of respect for Demi – AND his girls.”

For the FULL STORY it’s only in the new ENQUIRER – on sale NOW!