Responses
I mean that they are siblings only by their parents’ second marriages. She’s a daughter from her mom’s previous marriage and he’s a son from his dad’s previous marriage. They weren’t really raised together (he left for boarding school after the accident) and he even tells her he never though of her as family at one point... everyone else might see them as brother and sister, but that doesn’t mean they see each other that way since they never really had a sibling-like relationship.
it's not the step-brother, right? that would be really weird