It was a race condition in my mental security. My brain hadn't allowed for the possibility that there might be something that I was *both* keeping from thinking about for my own good, *and* not talking about with my partner because we'd already discussed it and it was a likely stress point for them, too. So I loaded it into active memory and quickly realized the error...

This is hilarious because both of us specialize in finding edge cases, corner cases, and other bugs. They gave a talk on it the night of our first kiss...