With my father's remarriage, I got a stepmother who is too sexy and a cute stepsister as my new family! But my stepmother is so erotic that I see upskirts and flashes of her breasts every day, leading to constant erections. I thought I was lucky with these exciting days, but my stepsister noticed my gaze and became jealous! She wanted me to turn to her and even touched my penis! Despite being my stepsister, I got really excited! As we were passionately seeking each other, my stepmother quietly watched and then joined in, saying, 'I can make you feel better,' leading to a 3P scenario where we fought over my penis!