We used to play together all the time—taking baths, talking, laughing. Those days now feel like distant memories. As time passed, I remained a virgin while my sister matured into a stunningly beautiful woman everyone envied. Watching her, I was left endlessly teased and frustrated. She would masturbate right in front of me, but I wasn't allowed to touch, forced to suppress my desire as I watched. Then came an even more shocking turn—she brought home a strange man and had sex with him right before my eyes. I couldn't take it anymore.