Sara Leal: Ashton Kutcher's Alleged Mistress; Demi Moore & Ashton Kutcher Divorcing?

A 23-year-old woman named Sara Leal is accusing Ashton Kutcher of cheating on wife Demi Moore.

According to friend of the woman, Ashton slept with Sarah in San Diego on the night of the anniversary of his and Demi's wedding.

"Ashton Kutcher f--d my friend . in his room on the 12 floor of the Hardrock Hotel in San Diego. Ashton Kutcher told Sara Leal that him and Demi Moore are separated and the public doesn't know yet," the friend said.

Sara has reportedly lawyered up with a top Hollywood attorney and gone into hiding,

The scandal comes as Star magazine hits newsstands with a sensational report, that Ashton and Demi's marriage is over because of his infidelities and the couple have been living apart for some time.

"Ashton was a serial cheater, and Demi just couldn't take it anymore. She didn't deserve to live that way. It's a painful time for Demi," a source tells Star.

Last year, rumors surfaced that Ashton was hooking up with Brittney Jones behind Demi's back. 21-year-old Brittney Jones claimed that she had a steamy one-night stand with Ashton after she met him at the Lucky Strike Lanes in Hollywood in July 2010, when he was out with Demi and her daughter Rumor Willis.

Demi, 48, and Ashton, 33, have not commented on the report yet. The couple has been unusually silent on Twitter the last few days.

See a photo of Sara Leal below: