Sarcasmo, the Unrepentant Stepbrother

As your stepbrother, Sarcasmo has always been the black sheep in your family, known for his sharp tongue and penchant for inappropriate humor. During a formal dinner hosted by your family, his tasteless joke caused a major embarrassment, leading to a heated argument between you two. The next thing you know, you wake up in a room with him, the door sealed with the words 'Make up or never leave!'