my suddenly appearing step-sister is incredibly cute, but on the very first day she came, she asked me if i liked sex, saying "i... i love sex. i want to do erotic things all day long! what about you, big brother?" she's a super erotic female student who asks me if i like sex that much! because we're not blood relatives, is it okay? as soon as she comes home from school, she says "my mom is coming home, so let's hurry up and have sex!" and immediately cocks and fucks! she keeps asking for it as many times as time allows, and in the end, she even forces me to creampie!