Note that the rules on spousal benefits changed in 2015.
https://www.ssa.gov/benefits/retirement/planner/applying7.html#h4
Because your current husband remarried (to you) he is not eligible for SS benefits based on his ex-wife's work record, only his own work record. His FRA is probably 66+, so retiring at 65 will give him a slightly reduced benefit (but he will collect it longer, which may work out in his favor, depending on how long he lives.)
