My first ex-previous wife used to live, before I married her, with her parents in an old London terraced house with a khazi at the end of the garden. At the end of one evening, I "paid a visit" before heading off home. After I'd done the business, as it were, I strolled back down the garden - and couldn't get into the house. The back door was locked. The lights were off. They'd all buggered off to bed!!
After a lot of banging (on the door) and shouting, my FEPW staggered down the stairs and let me in. Apparently, she hadn't noticed that I wasn't there, and had justy gone off to bed!
And I still married her! Big mistake!!