My sister like teasing that the bro should not be embarrassed to be seen naked by his sister, even if his penis is pointing to her face. I had not planned this, and that my sister was taking the initiative. Therefore, I was not guilty of sexual abuse. Moreover, she was my sister. I did love her. As the baby of the family she was somewhat spoiled. I feared her bad moods. I also feared that if I did not grant her request, she might ask another boy.Finally, and most obviously, I could not hide my desire for her. And I gave up.