"It's probably a little messed up. But that's okay. Some of my favourite people are a little messed up. It's why I like them."

She pauses on the step to look him squarely in the eye (which the narration only comments on because that doesn't happen much to Mary step).

"What is it with the people I know not thinking they're any good?" With this cryptic comment, she kisses him on the cheek, (because he does tend to stand there like an idiot) gets the door open and leaves him to make his own way up the stairs.