It was just another boring day for me... until my stepsister Dixie came into my room with a look of concern on her face. I can tell she wanted to tell or ask me something by the way she was talking to me. After some nonsensical chatter, she finally gets to the point. She has been dating this guy and he’s uncircumcised. She’s afraid of it but doesn't wanna hurt his feelings by making a gross face or hurting him. Dixie wants to practice on my dick! At first, I was shocked but I can tell my sister wasn’t gonna take "No" for an answer . She wasn't wearing anything except a towel. I always wanted to fuck my hot sister and I guess now’s my chance, I let my petite sister bounce on my big dick till I cum right in her mouth. I can tell she liked how my big fat uncut cock felt inside her. She even loved the taste of my cum in her mouth and had the biggest smile on her face after she finished me off.