Got my sister to let me record her hot tits at 13

I snuck into her room while she was changing. She caught me staring at her developing body, but I played it cool. 'Just checking out your new tits,' I said with a smirk. She blushed but didn't stop me. I grabbed my phone and started recording. 'Come on, sis, let me capture these bad boys,' I teased. She hesitated, then gave in, posing for the camera. Her 13-year-old body was already turning heads, and I knew I had to get this on tape. She giggled as I zoomed in on her perky tits, her innocence adding to the thrill. 'You're such a perv,' she laughed, but she didn't mind. I saved the video, knowing it would be my little secret.