After a celebrated six-year May-December marriage, Ashton Kutcher and Demi Moore have decided to go their separate ways, but not before Moore seeks a share of some of Kutcher's earnings.

Moore's divorce from Kutcher is reported to spark a $290 million fight over their pre-nuptial agreement. The couple may have signed a pre-nuptial agreement but Moore is determined to claim some of Kutcher's wealth due to her anger over his treatment of her.

Moore has reportedly instructed her lawyers to punish Kutcher financially. The 49-year-old actress has confirmed that she is splitting from the 33-year-old Kutcher after it was alleged that he had cheated on her with another woman.

"With a pre-nuptial agreement, Ashton should be sitting pretty. But Demi is furious. She wants to punish him financially because of the way he has broken her heart. She is talking about going after a share of what he has earned since their marriage contributed much of what he has achieved," a source told "femalefirst.co.uk."

"She is going to give him a bitter fight and, whether or not she wins, it will be an expensive lesson for him," the source added.

The actress, who was the greater earner of the pair at the start of the couple's relationship in 2005, is reported to have received as much as $20 million per film during the height of her acting career, and following her divorce from actor Bruce Willis in 2000 has received a settlement of $80 million.

On the other hand, Kutcher, who received early success with the hit Fox TV series "That '70s Show" in 1998 and his reality-based MTV series "Punked," now currently stars in the hit CBS sitcom "Two and a Half Men" from which he is estimated to have earned $7 million last year, is a producer with interests in a number of other media enterprises.

According to the Daily Mail, celebrity divorce expert Raoul Felder said that the legal challenge for Moore could be a difficult one.

"There are very few grounds for overturning a pre-nuptial agreement," the attorney said.

Is Moore really serious on punishing Kutcher through financial matters? Will she be able to get what she wants from this ordeal that she is facing?