No.  Your new spouse could not be added if you obtained a reverse mortgage loan before marriage.  If you add your new spouse to the title, that does not alter the terms of the existing reverse mortgage, but there would also be no deferral for your spouse because they were not accounted for on the original loan.  The only way to protect your new spouse with a reverse mortgage is to refinance to a new loan that would consider both of your ages in the calculations.