When the parents just left the house, it was also the moment when the two siblings together engaged in the coming-of-age game: sexual intercourse. Being in their puberty, it is understandable that they often have desires and curiosity about sex, so it is not surprising that the two siblings did not think about the consequences of their actions. They only saw the immediate benefits of physical pleasure and satisfaction, forgetting that what they did was extremely wrong, contrary to ethics and morality, and it could lead to very serious consequences. However, it cannot be blamed on each individual; when the younger sister, with her rosy skin and plump body, always displayed seductive actions in front of him, it was natural that the older brother could not control himself and committed a wrongdoing.