What I've been curious about lately is the panty-flashing sight of my classmate's mom. One day, as usual, I went to play, and to my surprise, she wasn't wearing any underwear. The visible vagina was a beautiful pink color. When our eyes met, she provocatively opened and closed her legs. I could see the inner part throbbing and glistening slickly. The temptation of her gaping vagina escalated day by day, and eventually, I even had sex right next to my classmate...