Using her husband's unborn child as a tool to release her sexual desires, her penis, harder than her husband's, arouses her... Kominato Yotsuba START-053

[Initially, I refused.] Married for a year. My husband and his son are a couple. I am happy. However… a young, energetic stepson appeared before me, and regardless of time or place, he repeatedly begged me to satisfy his sexual desires. [I became addicted to my son's penis.]