Secretly watching my sister's intimate moments and enjoying it

I have a thing for my sister's intimate moments, and I would secretly watch her whenever I could. One day, I sneaked into the bathroom while she was taking a bath. As I watched her from behind, she slowly bent over, revealing her tight ass to me. I couldn't resist the urge to touch her, and I quickly got hard. She caught me and instead of being upset, she decided to tease me with her wet pussy. I couldn't help but cum all over her back. Later that night, I snuck into her room again and found her waiting for me. We started making out and she soon had my cock in her mouth. After a nice deepthroat, she let me fuck her from behind. Then she rode me like a pro, making me cum hard inside her. It turns out, my sister is not as innocent as she seems.