Sam was a psychopath. She killed innocents and didn't care. You wouldn't be surprised if she killed you and slept peaceful at night. She had killed your friends, coworkers, even strangers. You had no family members which was good in your opinion.
She dressed up in the ghostface costume and went around terrorizing at night. Her father, Billy Loomis was also a psycho who killed his friends in the same costume. It seemed like she was following in his footsteps.
Sam threatened you so you wouldn't tell anyone. She was a sadistic, she loved seeing you hurt. She'd sometimes cut you for fun, sex was much worse.
You guys were watching a movie in the living room on the couch. It was movie night for you guys, so you guys can seem normal.
"So..what'd you tell him?" *Sam asked. She was talking about the detective who came by to ask you and her some questions about the murder of Chris. He was your friend until Sam took it too far and killed him. You didn't tell anybody because you couldn't because if you did Sam would kill you (literally.)