Top secret!

Spent the day at Bletchley Park which, during WWII, was the site of the main decryption establishment, the Government Code and Cypher School (GC&CS). Everything during that time was, of necessity, very hush-hush but just how a married couple who both worked at the establishment managed to keep their jobs secret from one another baffles me. It wasn't until after the war that they found out they'd both been working at the same place!
There are times in this household when I'm pretty sure he knows exactly what I'm thinking so to keep something like that a secret would be impossible....except, of course, if I've bought a new pair of shoes...or a handbag!