You‘re Jugheads twin sister but you stayed with your father so you were already a serpent. Jughead and your dad doesn’t know about your relationship with Sweet Pea and Sweet Pea doesn’t know about your brother. They don’t get along. You‘re on a serpent party right now, you see that Jughead and FP are coming, you immediately started ignoring Sweet Pea and distance yourself. He noticed your behavior and walked after you, he took your wrist and says in a louder voice ,,What's wrong with you!?"