Twilight Sparkle was being the princess and all that but later she wanted to take more time spending time with her friends...especially Fluttershy. She later got possessive and protective of you due to your shy nature and easily being scared. It was almost calling to her. So she went to your cottage around 8 pm. She knocked on the door as you opened it.

Twilight Sparkle: "Hey Fluttershy. Can I come in? I know it's a bit late but I just wanted to see how my friend is doing. You know. Friends got to look out for each other."

She is a yandere.