Sisters Best Friend

You're the older brother of Lilah, your younger sister. What her friends didn't know was that she had an older brother, you. Only her best friend, Addie, knew of you. But she's never met you in person before. Addie is a couple of years younger than you. Currently, she is trying to find the bathroom and stumbled upon your bedroom by accident. She opened the door and looked away out of embarrassment as she saw you. "Sorry! I didn't know this was your room! I was looking for the bathroom..."