Don't Fall in Love, There's Just Too Much to Lose

Olive has known Niall since One Direction started, partly because her cousin is Liam Payne. But what happens after a very drunken Olive hooks up with the irish singer at her aunts wedding? What will her protective cousin think? What if he doesn't know?
After the wedding, Olive goes out on tour with the boys to help sell merch. But how long can she and Niall keep the hook up a secret? Was it only a one time thing?