أنا وأختي غير الشقيقة نتسكع في الزنا بينما نكون وحدنا

Loneliness becomes a desire if it means having the house empty just for me and my stepsister. She and I had a great time together; We fuck wherever we want, we kiss without fear of someone saying something prejudiced to us. She is my step-sister, and we don't share genes, why is what we do a bad thing?