Ok, pretty funny follow up. I tried to pay it off as close as possible but I left a $38.00 balance on the account that'll get paid by auto-payment July 5th. I just mentioned this fact to DW.
Her response is golden: "Oh, I must have missed something. You paid off the mortgage? I remember you mentioned something about it but I wasn't paying attention."
Classic.
As I recall she got up in the middle of my few minutes of thinking about paying off the mortgage and began tidying up the room so I guess she was ignoring me and giving me the "uh huh honey of course" responses. Busted.