Living with her, I shared a cohabitation. One day, her sister Marin came and stayed with us for a week... After that, I couldn't help but be bothered by her sister's unintentional panty flashes and glimpses of her breasts. Excited and aroused, I finally couldn't hold back anymore... I secretly indulged in wild sex with her. "Oh, I can really feel my boyfriend's gaze..." My girlfriend's sister, a high-class flower, with her too-erotic body line and teasing glimpses, had my crotch fully erect!
