Ziall-Unfaithful

One night of unexpected passion changed everything.
Zayn was in a relationship with Niall's best friend. It seemed as though Niall and Zayn shared nothing but hate. One night changed that. One night a argument between Niall and Zayn turned to passion. Feeling neither of them wanted to surface came up. They fall inlove even though it's wrong. What happens when neither of them can hide anymore? What happens when the love they share won't be hidden away?