Not merely plausible, but real. In New Jersey, from 1776 to 1807, the franchise was limited to those "inhabitants" with sufficient wealth/property - not all "men." Thus, widows and spinsters with sufficient property of their own (though not wives, for at the time, wives could not hold property) were able to vote. According to wiki, there were widespread allegations of electoral rivals using 'petticoat electors' (women who were not actually qualified to vote) to win election.