A woman on Thursday admitted having her antique dealer husband killed 20 years ago in front of his girlfriend's Manhattan home, then collecting millions in life insurance after his death.

Barbara Kogan pleaded guilty in Manhattan state Supreme Court to first-degree manslaughter, conspiracy to commit second-degree murder and grand larceny. She faces up to 25 years in prison on each count at her May 19 sentencing.

Kogan, 67, was charged two years ago with murder in the Oct. 23, 1990, death of her husband, George, who was shot three times in front of his girlfriend's Upper East Side apartment building.

Prosecutors say she got her lawyer, Manuel Martinez, to hire a hitman to kill Kogan during their bitter divorce fight, then collected $4.3 million in her husband's life insurance.

Kogan's attorney, Barry Levin, said she entered the plea to spare her two sons from being forced to testify against her at trial.

"It had been weighing heavy on her mind," Levin said. "She decided she wanted to put this behind her."

Though long suspected, Kogan wasn't charged until 2008, after information implicating her emerged at Martinez' trial. His prosecution was delayed for years while he was held on unrelated charges in Mexico. Martinez is serving a 25-year-to-life term for the killing.