A slight amount of googling shows this page to be incorrect. The woman was convicted of murdering her husband; rape was not involved. This page should be deleted until it is rewritten 

 Reference: 
 * Murdered by His Wife: A History with Documentation of the Joshua Spooner Murder and Execution of His Wife, Bathsheba, Who was Hanged in Worcester, Massachusetts, 2 July 1778. By DEBORAH NAVAS . (Amherst: University of Massachusetts Press, 1999 .