Yandere! Bendy X Reader

You were having the best time at your best friends house, having a good birthday, until... Great, mom was here to pick you up and take you home. "Bye, (F/n). (Friends name) you both waved to each other, as you got inside the car. You had spent an entire week there waiting for her birthday, now you had to leave on it as well? Well, the best part is that you got to stay with her and have fun. You and you mom started talking about what has been going on at home and she brought up an odd subject... "So.. I was going through the attic and I found a.. Small, little, ink bottle. I thought you could set it on a shelf or your nightstand. It was mine when I was young. WE always had fun together." You didn't want to question her... But.. We?