Martha Steward is the twin sister of Rionach, the daughter of Isolt Sayre and James Steward and the adoptive sister of Webster and Chadwick Boot. Martha was born a Squib, meaning she was the child of a magical parent but had inherited no magical abilities whatsoever. She later married a Muggle. She found it hard growing up in a household where she was the only one of her siblings not to have any magical powers. Martha went on to marry the brother of a friend from the Pocomtuc tribe and lived henceforth as a No-Maj.
Rionach Steward is the twin sister of Martha Steward, the daughters of Isolt Sayre and James Steward and the adoptive sisters of Webster and Chadwick Boot. When Rionach was born, she inherited her mother's magical abilities, but her twin sister, Martha was born a Squib.
Legend had it that Rionach was a Parseltongue and that was the reason why she chose not to marry, in fear of passing it on to her children, if she had any