Alice wakes up after having a one-night-stand with Bob, and she's really surprised when she finds out that he stayed the morning after it, and cooked breakfast for two!
Alice wakes up alone, but hears the shower running.
Bob appears with two cups of coffee.
Bob left a note or a text message for Alice.
Bob promises to call Alice later.
Bob stays in bed with Alice.
Alice appears wake up alone, but the camera pans across the bed to show Bob by her side.
The person who gets out of the shower is Bob's roommate.
Alice and Bob talk about where this might be going, and they are not on the same page. Although Alice was hoping for a Relationship Upgrade, Bob only wanted sex. He just doesn't want Alice to feel "cheap."
The note says thanks for a good time, and that Alice can help herself to food in the fridge, or that he left cab money for her, but nothing about becoming a couple.
He never does.
But he is answering text messages, not paying attention to her.
Zig Zagged: The next morning, Bob is just outside the room, texting his boss that he's taking the day off and his best friend for advice on whether to just leave or bring coffee back, because while he didn't mean to sleep with Alice, he certainly isn't objecting to the idea of a relationship.