HP: Twin Devils

This is my first ever fanfic of any kind. The main point of this story is if there were the twins-who-lived instead of the boy-who-lived. I plan on making it pretty close to the cannon story in terms of the skeleton plot. But I'll be aiding a lot of background and my own little spin on the wizarding world.
I do not own Harry Potter. JK Rowling owns everything to do with it. Also IF you do not like swearing I recommend you leave now. All of my stories feature swearing. So you have been warned. ALSO there will be scenes and mentions of abuse if you dont like it leave. I'd rather avoid people being scared or uncomfortable