I Fell In Love With My Adopted Brother

Hiiii !! so this is my first story, please don't hate me if it sucks let's just hope the story ends in a great way.
Soo.... this story is about a girl named Lilly that happened to be Niall's step sister. Lilly's mum named Maura Horan and her dad named Bobby Horan was walking down the street when they heard a cry of a baby they turned and saw a little angel in the garbage bag, he has tiny brown hair, blue eyes, white skin and adorable appearance.
it happened to be Niall Horan....
From that morning their life started to change... :)