BOSTON — Joan B. Kennedy, the former wife of Sen. Edward M. Kennedy who endured a troubled marriage marked by family tragedies, her husband’s infidelities and her own decades-long struggles with alcoholism and mental health, died on Wednesday. She was 89.

The former Joan Bennett, one of the last remaining members of a family generation that included President John F. Kennedy, was a model and classically-trained pianist when she married Ted Kennedy in 1958.

Their lives would change unimaginably over the next decade and a half. Brother-in-law John F. Kennedy was elected president in 1960 and assassinated three years later. Brother-in-law Robert F. Kennedy served as attorney general under JFK, was elected to the U.S. Senate in 1964 and assassinated while seeking the presidency.

Her hus

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