Arnold's "Vital Record of RI" shows Mary Weeks as a widow, and says they were married by Samuel Hopkins, Justice. Craig Rice's online database shows Ezekiel with two wives, Ellen Spencer and Mary Spencer, and refers to a descendency shart showing Mary to be Mary Spencer Weeks. However, Craig's indicated date of marriage is not correct.
Ezekiel's will mentions his wife Mary and father-in-law William Spencer, so it is very possible that he married two sisters; a widower married his sister-in-law, a widow.
James N. Arnold's transcriptions of East Greenwich marriages shows an Ezekiel Whitford, son of Ezekiel deceased, marrying Mary Hill, of Thomas, on 9 March 1755. That Ezekiel could possibly be a son of this one who died in 1754. However, Craig Rice shows him as son of Ezekiel Whitford and Mary Stafford.
1713 - 1754 (41 years)