My step-sister, who I got from my father's remarriage, is super selfish! One day, my step-sister asked me to give her an oil massage! Her ass was shiny with oil! Her breasts and pussy were visible through the glass! It was so erotic that I got rock hard! Then my step-sister said she was going to give me a massage, and I was in big trouble! My erection was immediately discovered! But my step-sister was also horny from the massage, so she took my erect cock in her hand and started an erotic oil massage! I couldn't hold it in any longer, and both I and my step-sister got into a heavenly erotic situation!