NACR-364 Lustful sister-in-law continuously solicits to fuck her brother-in-law while her sister is away

Even though we are not blood related, my brother-in-law always treats me kindly. One day, my parents went on a trip. As soon as I was alone with my parents, my brother-in-law suddenly changed. My brother-in-law's twisted feelings were directed at me. Locked in the room and alone. At first, he resisted, but he was raped and brainwashed by his brother-in-law, and fell into a twisted love...