My suddenly-formed step-sister is super cute, but on the day she first came over, she asked me if I liked sex, "I love sex. I want to do naughty things all day long! What about you, big brother?" She's such a big-sexy girl that she asked me if I liked sex! I guess it's okay because we're not related by blood, but as soon as she came home from school, she said, "Mom's coming home soon, so let's have sex quickly," and we immediately had sex! She kept asking for it as many times as time allowed, and even forced me to cum inside her in the end!