His Best Friend's Sister A Sirius Black X Reader.

When Sirius Black has a long summer vacation with two of his best friends, James and y/n, he gains a small crush on his long-term girl best friend...alright small is the wrong term. A huge crush on his best friend's sister. he's worried that this crush will ruin his friendship. what will he pick? will he fuck his best friend's sister or just be best friends with her. I mean moving from best friend to dating isn't a hard jump right? ... right? find out what he picks in the book "he fucked his best friend's sister" right now.

a/n
hope you all enjoy this. it excites me to finally write a Sirius black x reader. again I hope you all enjoy it. there are going to be some trigger warnings in this book but I will put a notice in each chapter about this. thanks for reading/picking this vote and if you do be ready to be his number one priority!