Step-sis indulges in steamy encounter with step-bro

My step-sis has always been a bit of a mystery to me. She's the kind of girl who keeps to herself, never really opening up to anyone. But lately, I've noticed something strange about her. Every time she goes out, she comes back with a strange look on her face, like something's been eating her up inside. I've tried to talk to her about it, but she just brushes me off. One night, I decided to follow her to see where she was going. I hid in the shadows, watching as she slipped into her dorm room. But what happened next, I never could have predicted. She locked the door behind her and began to undress, revealing her petite, yet alluring body. And then, she dropped to her knees, her hands reaching for my throbbing cock. I couldn't believe what I was seeing. My step-sis, the quiet girl next door, was giving me a blowjob. It was a sight to behold, her small tits heaving with each gasp as she took me deeper and deeper into her mouth. And when she was finally finished, I knew I had to return the favor.