Until death do us part... (Jeff the killer x reader Lemon!)

He sneaks into your room one night when your home alone on an escape from the police... You're awaken in the middle of the night to see him on top of you... Knife at your throat... "Move or say a word and I'll fucking slit your throat you got that!" Oh crap... What do you do? do you listen to him? But what if he kill...