Suddenly, I got a super cute stepsister. We got excited by each other's bodies and started thinking of each other as the opposite sex, but then my parents went on a week-long trip! Living alone together, my stepsister and I got carried away and flirted with each other like lovers, but since we're brother and sister, we made a promise not to have sex and just did some bareback sex, so we did bareback sex every day until our parents got home! Living like that, my stepsister and I couldn't resist the urge to insert it! On our last night, I couldn't hold back from the bareback sex and ended up inserting it raw and creampieing her, causing her to arch her back and cum repeatedly!