While enjoying some private time with my favorite porn, my step-sister walks in, catching me mid-act. Embarrassed, I try to hide, but she's intrigued. She approaches, asking if she can 'help'. I hesitate, but her innocent yet hungry eyes convince me. She kneels, taking my throbbing cock into her small hands, exploring it with curiosity. She tentatively licks the tip, then takes it all in, deepthroating like a pro. I hold her head, guiding her as she sucks and licks, her spit coating my shaft. She looks up, eager, and I can't hold back, cumming hard into her mouth. She swallows every drop, smiling.