According to her daughter Jane, who gained access to medical records with help from lawyers, Seymour was a victim of recurrent child incestuous abuse and had nine abortions in her lifetime.

A year after Brokaw died, Seymour married actor Henry Fonda on 16 September 1936, at Christ Church, New York City.

[3] The couple had two children, actress Jane (born 21 December 1937) and actor Peter (23 February 1940 – 16 August 2019), but their marriage was troubled.

According to Peter Fonda, these difficulties later gave him empathy for the marital problems of actor Dennis Hopper, his co-star in the 1969 film Easy Rider.

[4] Hopper's then-wife Brooke Hayward is the daughter of Margaret Sullavan, Henry Fonda's first wife.