No. John's last name was Sevier. He married Catherine "Bonny Kate" Sherrill 14 August 1780, after losing his first wife, Sarah Hawkins, a few months earlier. Nothing shocking about this. It was common, and EXPECTED, for a man to remarry within two months and sometimes as early as one month, after losing his wife, particularly if he had children.
Sarah died in the Spring.
Sarah gave birth to their tenth child, Nancy, had complications, they had to fort due to an impending Cherokee attack. She made it to the fort, but died early one morning before the fighting broke out.