My beloved mother and brother were having sex behind my back. To not lose to my brother, I'm going to fuck my mother, whose face is now exposed, until I'm satisfied. [Codependency] Mother-son incest. [Issue Momoko ROE-506]

Five years ago, after my father passed away, my mother raised my brother and me alone. To me, she was more important than anyone else. But ever since my brother went to Tokyo for work and before he returned home, I'd felt that my mother wasn't acting like usual. "I bought better meat than usual today. Brother likes stewed beef, doesn't he?" She seemed completely oblivious to me, interacting with my brother in a strange way. Then, I witnessed—in the bathroom, my mother was happily sucking my brother's penis…