You weren’t yourself, that night.
Usually, when you got back late, you went straight to bed. I’d wait for ten minutes or so, until you’d finished clattering about up there, then creep up the stairs and slip into bed beside you. And then lie awake, staring at the ceiling. Listening to the clock. Tick. Tock. Trying not to wonder where you’d been, and with whom, and what you might’ve got up to.