AU Scream. Cassidy Becker, Casey's twin sister, not only has to deal with the gruesome death of her sister but a obsessed homicidal maniac. Implied Randy/Cassidy(OFC). Prequel to 'Scream 4: Dead Girl Walking'

16-year-old Cassidy Becker sat in her friend, Sidney Prescott's bed, going over something for their English project. Her parents were out on a date and Casey was home alone probably making out with her jock boyfriend Steve Orth while 'Halloween' was playing in the background.

However after just talking to her a couple minutes ago on the Prescott's home phone, Cassidy was a bit concern about Casey after hearing the sound of her voice one can described as terror. But she assumed it was Steve being a dick and to call the police if 'he' calls and terrorized her again.

Cassidy signs deeply as she stretches her arms out before hearing a small but noticeable sound from outside Sid's window. Sidney herself stops from typing on her computer, looking over to her window.

"Did you hear that?" Sidney asks.

"Yeah.."

Sidney got up to go investigate the source of the noise. She slowly stuck her head out the window to see if there was anything outside. For a moment it seem like it wasn't anything to be worried about, it was a dark night with clear skies with the sounds of crickets and the neighbors' dogs barking. Suddenly, someone just appeared from the side of Sidney, his hand on her shoulder.

Cassidy and Sidney scream out, completely frighten.

"Sidney it's me." whispers her boyfriend Billy Loomis.

Cassidy only rolls her eyes, her hand over her chest, feeling the rapid heartbeat of her heart.

"Billy what the? What are you doing here?" Sidney whispers.

"You scared the shit out of us!" Cassidy whispers angry at him.

Billy carefully crawls into her window, looking up and down at Sidney's nightgown. "You sleep in that?"

"Yes I sleep in this." Sidney whispers. "My dad's in the other room and Cass is staying over. You can't stay in here."

"Hey don't let me interrupt your little girl-on-girl sleepover." Billy grins softly at Sidney.

"For the 100th time Billy, I'm not a lesbian." Cassidy grits at him.

"I didn't start that rumor," Billy said defensively.

Neil Prescott, Sidney's father, was now knocking at her door. All three teenagers felt their heart stop. "Are you girls alright?"

Sidney, now panic, had Billy hide on the other side of her bed. Cassidy had attempted to pose in hopes to not look suspicious. Mr. Prescott attempted to open her door but couldn't due the closet door being in the way and blocking its way. Sidney closes her closet door so her father could open her bedroom door properly.

"Is everything alright?" he asks sounding concerned.

"Could you knock?" Sidney asks.

"Well I heard screaming."

"No you didn't." Sidney said quickly.

"No?"

Sidney opens the door so he can have a full view of her room to ease suspicion that she have someone, beside Cassidy, in her room and that someone was her boyfriend. Cassidy only waves.

"Hi Mr. Prescott."

"Hello Cassidy. I hope you and Sid are getting your project done." he said.

"Oh we are."

Looking a bit satisfied, Mr. Prescott only nods. "Well Sidney I'm gonna hit the sack. My flight leaves in the morning." he explains. Now the expo runs all weekend so I won't be back until Sunday. There's cash on the table and I'll be saying at the-"

"Hilton." Sidney finishes.

He nods. "I'll be at the airport so call if-"

"I need anything. I got it."
Mr. Prescott looks into her room again. "I swore I heard screaming." Sidney smiles at her dad and kisses his cheek.

"It wasn't Dad."

"Ok sweetie. Good night girls."

"Night." Sidney said, closing her door and locking it. She looks over to Cassidy.

"He's still here." she said pointing down to where he was hiding.

"Oh close call." mutters Billy.

Sidney signs. "Billy what are you doing?"

"Well," he began tossing a stuff animal at Cassidy's direction which earned him a scowl from her. "It just occurred to me that I never snuck through your window."

"Ok now that you got that out of your system." Sidney said trying to get him to leave.

"I was home watching 'The Exorcist.' and it got me thinking about us."

Cassidy gave him a look of disgust. "Eww. Billy that's a terrible and gross that you compared your relationship with Sidney to a movie about a 10 girl year girl possessed by the devil."

Billy ignores her comment. "At first we was hot and heavy and then we're at the TV version. All the good stuff cut out." His face was inches from hers.

"So you thought you come up for some raw footage?"

Cassidy signs. "I'm gonna go to the bathroom and leave you two love birds along." She got up and leaves the room.

A few minutes later, Cassidy came back into room with Sidney looking out her window. She raised a eyebrow.

"So now raw footage?" Cassidy questions.

"Well, more of PG-13." said Sidney, pulling her head back inside to go back to her computer.

"What's PG-13?"

"I flashed him." said Sidney, finishing up her paper. "You know I thought you like Billy."

"I did," Cassidy said. "At first."

Sidney looks at her. "But?"

"I'll be honest Billy was pretty cool and seem like a great catch for you." Cassidy said putting her hair into a ponytail. "But after last year…it seems like his demeanor changed."

Sidney bit on her lip. Her mother, Maureen Prescott, was raped and murdered and it was all this small town could talk about. Around that time, Billy's mother just suddenly left Billy and his father without a reason.

"His mother abandon." Sidney said to his defense.

"I think it's way deeper." Cassidy said. "I can't explain it but I think Billy change and it's not a good one."

"I think he's just frustrated with me." Sidney mumbles.

Cassidy scoffs. "Why? Cause you don't wanna go all the way with him?"

"Maybe."

"Listen to me. If Billy and his dick can't wait then they both don't deserve you." Cassidy said.

"I think he's coming around."

Cassidy rolls her eyes. "If you say so."

So review to give me suggestions.