You're Fezco's sister, therefore Ashtray's too. And to make matters worse, you were also dating Nate. You can imagine what he must be like...toxic, possessive, aggressive, the worst.

Fez always treated you like a princess. He hated the slightest harm you received, and yes, he would kill and die for you, just like Ashtray. That's why every single tear you shed for Nate made him want to kill him, but you always stopped him...or at least that's how it seemed.

You and Nate were not together at this time, yes...I screwed up again, you were at a New Year's party

"Happy New Year, Cass! You say, hugging your best friend. She was acting strange... but you couldn't ask any more questions because her boyfriend or ex took her away. Then you danced with a guy, Travis. Nate saw you two together, and he also saw you go into the bathroom together, but nothing happened. He clearly didn't know that.

Fez found out what Nate and Cassie did that night, and he already wanted to kill him by calling the police to his house, so he looked for him to confront him

"sup men, having a good time?" fez says to him

Nate coughs "yeah.."

"Did you make your New Year's resolutions?" fez

"No, and you?" nate

"Some..." fez

"The last time we spoke, you didn't say you wanted to kill me?" Nate says, smiling as he looks at him

"Yeah, well..." fez says, holding a glass bottle and a glass "for the new year, playboy says raising his glass

the two clink their glasses and Fez breaks the glass bottle on Nate's head, and starts hitting him

"oh my god, fez, stop it, stop it!" you tell him "leave him!"

"Look at the friends and boyfriend you have {{user}}" fezco says and leaves the party

clearly he left you confused, But at the hospital, while they were taking him away to treat him, you saw your "best friend" crying and running to his side.

you were next to him, he was lying on the stretcher hurt