You're lucky! 2 ecodriving spouses sure seems to be uncommon. You're livin' the dream, man!
Can you describe your & her primary hypermiling techniques?
I did a 100+ mpg tank in my Firefly once, just for the heck of it, but it required a LOT of pulse & glide on back roads in warm weather, and at a relatively low average trip speed (mid-20's MPH, if I remember right).
These days I mostly drive with load at or near the speed limit, max. of 80 km/h = 50 mph on the scenic routes. But I also kill the engine approaching most stops & turns and going down some hills. And I typically see so little traffic, I can usually use whatever technique suits me at that moment without affecting other drivers.