The guy nods vigorously. ‘Yeah. He’s inside all right.’ He clenches his fist and taps the wall next to the door. 'Inside my fucking girlfriend.
-- Graham (Chapter 1)

Importance: Quinn first meets Graham after he had tracked his girlfriend and Quinn’s fiancé to Ethan’s apartment where they are having sex. Quinn does not believe what Graham is telling her at first until she hears a woman screaming Ethan’s name.

I crack open my cookie and slip the fortune out of it. ‘If you only shine light on your flaws, all your perfects will dim.
-- Quinn (Chapter 1)

Importance: Quinn does not like her fortune because it has a grammatical error in it. It is only years later that she understands how much she needed this advice. Quinn has been focusing on her inability to have children to the point that it has taken over her life.

But nowhere in that jeweler’s explanation did...
-- Narrator (Chapter 2)