NEW YORK (CBSNewYork/AP) — Barbara Sinatra, the fourth and last wife of legendary crooner Frank Sinatra, has died at the age of 90 at her home in Rancho Mirage, Calif.

A former model and Las Vegas showgirl, Barbara Sinatra was a prominent Palm Springs socialite in her own right before she married Sinatra.

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Barbara was married to the Hoboken-native singer from 1976 until he died in 1998, and achieved her own fame by founding the Barbara Sinatra Children’s Center to help abused children at Eisenhower Medical Center.

The nonprofit has provided therapy to more than 20,000 young victims of physical, sexual and emotional abuse since opening in 1986.

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“She died comfortably surrounded by family and friends at her home,” Children’s Center Director John Thoresen said.

Thoresen said Sinatra remained active at the center until recently, raising funds and visiting with the children.

Sinatra is survived by her son Robert Oliver Marx, his wife Hillary Roberts and her granddaughter Carina Blakeley Marx.

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(© Copyright 2017 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)