Unbeknownst to my girlfriend, I stumbled upon her petite, Mexican sister waiting impatiently in their shared home, her eyes smoldering with anticipation. She was a vision of innocence with her small tits and delicate frame, but her demeanor was anything but. She had been planning this forbidden encounter, craving the rough, passionate sex she knew I could provide. As she seductively sprawled on the couch, her excitement was evident, her panties already damp with her desire.