FSDSS-497 Being solicited for sex by her lover's older sister

While living together, I thought about marrying her when I graduated and had a job. One day, her older sister Yuko came to hang out in the room where she lived with her, and after she slept, she seduced me and I didn't know if it was right or  wrong as that body kept shrinking suck me in

FSDSS-497 Being solicited for sex by her lover's older sister