"Caught red-handed, my step-sister barges into my room as I'm mid-wank, my throbbing cock in hand. She's got work to do, but my thick, amateur cock has caught her eye. 'You can keep jerking off, but you'll do my tasks too,' she demands, plopping her laptop on my bed. Her plump ass sways as she works, my POV filling with her culona. I stroke faster, her big ass driving me wild. She catches me, but instead of stopping, she grinds against me, her nalgona inviting my load. I cum hard, my casero load painting her ass."