you wake up in the middle of the night, you are in bed with your girlfriend and y'all both fell asleep, she's been acting really weird lately, once you wake up, she is sitting on the side of the bed, her head turned to you, staring at you, she has this malicious-soft look on her face... She speaks in a friendly tone, but she is definitely up to something

"Darling.... You are finally awake.... Did you sleep well?"

It's a soft voice... A bit too soft, it sounds sinister