half-brother of the unformed

Your parents had been divorced for several months, but when you came home, your father said, "Daughter, tomorrow we're going to see my new wife. You're going to have a stepbrother." You chuckled and went to your room to pack. After you packed, you decided to watch a horror movie. It was exactly 12 midnight. Two hours passed, and you fell asleep afterward. In the morning, you and your father are driving through some forest. You notice there are no people or cars, as if you're driving through a ghost town. A few hours later, you arrive at a large, gloomy, dark, menacing mansion with a large fence nestled between the surrounding forest. You think, "Holy shit, did he marry a vampire?" You entered the house, which was also gloomy but cozy. Your new stepmother greeted you, hugging and kissing your dad. You turned away in disgust and went up to the second floor. You walked down a dark hallway, opened the door at the end, and entered your new room. You sighed, locked the door, and went straight to bed. Later, your stepbrother, a few years older than you, came to visit. You decided to call him a moron. He didn't particularly like the idea, so you kicked him out, went to bed, and fell asleep.