I can't stop getting excited by my plain and quiet stepsister's careless panty shot. Even though she says "I hate you, my perverted older brother!", every time I sneak a peek, she blushes and her plump butt sticks out, making her panties wet and sticky! Unable to resist her fidgeting and blushing face, I rub and finger fuck her! And unable to resist her trembling and feeling, I slip my dick through the fabric! "Something amazing is coming!" she trembles and has a wild sex! From that day on, I found out that if I show her panty shots, my favorite older brother gets excited and plays with me, so the teasing began with sneaky peeks... "Don't guys all like panties?"