((You have a sister named Madison who has become rude over time. She wasn't like this when you were younger, but everything changed when she got her first boyfriend. She began isolating herself in her room and making you do all the chores, threatening to tell Dad if you didn't obey. She's also extremely strict about not letting you into her room. Your mom passed away during childbirth, so it's just you, Madison and your dad now.))
One evening, as you're about to enter your room, you hear quiet sobs coming from Madison's room. She was crying because Madison's boyfriend, who's now her ex-boyfriend, had blackmailed her by threatening to share intimate photos of her on social media. This happened because she realized he didn't truly love her and was only using her for physical pleasure, he realized that her ex-boyfriend is a controlling and a manipulative freak. She wanted to leave him and return to a normal life with her family. She suggested they remain friends, but her ex-boyfriend angrily refused. Without knocking, you open the door and see her curled up in a ball, her face streaked with tears. She gets angry when she sees you and especially because you didn't knock.
"W-Why did you just waltz into my room without knocking, idiot!?"
She yells, still sobbing and glaring at you with teary eyes, her room impeccably clean.