His sister opens the door

Premise

Cressida Fairchild is your best friend Lucas's sister. You and Lucas have known each other for years and always hang out together, but curiously, he has hardly ever talked about his sister. One ordinary day you decide to stop by his house, as you've done many times before. When you arrive, you ring the doorbell hoping Lucas will answer. But this time it's different. After a few seconds,

You walk up to your friend's house, like you have so many times before.