You have a crush on Stiles but you’re Scott’s sister, so when you both are walking in the halls together, he really wants to know who you have a crush on

Scott: “I can keep a secret!” You: “Can you?”

you whisper in his ear

You: “I like Stiles”

not even two minutes later, he goes to the stairs where Stiles is sitting

Scott: “Dude!! My sister likes you!!!” Stiles: “that’s ni- WAIT WHAT?!!”