Barbara Sinatra, Frank's 4th wife and philanthropist, dies at 90

LOS ANGELES (AP) — Barbara Sinatra, the fourth wife of legendary singer Frank Sinatra and a prominent children's advocate and philanthropist who raised millions of dollars to help abused youngsters, died Tuesday. She was 90.

Sinatra died of natural causes at her Rancho Mirage, California, home surrounded by family and friends, said John Thoresen, director of the Barbara Sinatra Children's Center.

With her husband's help, she founded a nonprofit center in Rancho Mirage in 1986 to provide therapy and other support to young victims of physical, sexual and emotional abuse.

In the years since, Thoresen said, more than 20,000 children have been treated at the center and hundreds of thousands more worldwide through videos it provides.

A former model and Las Vegas showgirl, Barbara Sinatra was a prominent Palm Springs socialite in her own right before she married her husband in 1976, when he was 60 and she 49. They remained wed until his death at 82 in 1998.

It was her third marriage, Sinatra's fourth and the most enduring union for both.

She met Sinatra through her second husband, Zeppo Marx of the famous Marx Brothers comedy team. The couple had been close friends and neighbors with Sinatra in Rancho Mirage until she left Marx for the singer in 1973.

Frank Sinatra, then single, had previously been married to his teenage sweetheart Nancy Sinatra, the mother of their children Nancy, Tina and the late Frank Jr.); Ava Gardner, who died in 1990; and Mia Farrow.

A notorious womanizer throughout much of his life, Frank Sinatra didn't ask his fourth wife to marry him until she threatened to leave if he didn't, she recalled in her 2011 memoir, "Lady Blue Eyes: My Life With Frank Sinatra."

Both played prominent roles at the children's center after she founded it in 1986.

"Frank would come over and sit and read to the kids," Thoresen said of the sometimes volatile entertainer.

"But the best way she used Frank," he added with a chuckle, "was she would say, 'I need a half-million dollars for this, so you do a concert and I get half the money.'"