On 27 Apr 1675 when Mary was 35, she second married George Spear in Braintree, MA. George died in Braintree, MA on 21 Mar 1719.
For more information, check out Verne Raymond Spear’s book The Descendants of George Spear who settled at Braintree, Massachusetts 1642-1999, West Hawley, MA, 1988.