Eighteen-year-old me was in for a treat when my step-sister's friend came over, looking for trouble. She was a petite teen, all soft curves and innocent eyes, but she had a filthy mouth and knew how to use it. With my step-sis out, she took the opportunity to suck my big cock like a pro, her tiny hands struggling to wrap around my thick shaft. She was hungry, eager to please, and I was more than happy to let her practice on my hard dick.