Sadie Moch - Member of The Reknowned Straus Families

Due to unfortunate circumstance... Sara "Sadie" Straus's family line is non-complete. Though she is associated with The Reknowned Straus Familes... it is possible that she was The Daughter of US Secretary of State, Oscar Solomon Straus or Reknowned Merchant, Isador Straus, who perrished on The HMS Titanic.
In spite the vagueness... according to my research,, in the possession of "The Moch Family", there was a book in the family bookcase about 'The Titanic'. Decades later... Alexander Moch, was a member of The US Government and was associated with The US State Department. It is presently assumed that Sara "Sadie" Moch was Daughter or Niece of one or them?