The conclusion of a story I never finished

And when he was done he heard her breathing heavily next to him, letting out soft sobs as tears trickled down her face. She did not speak, but her sorrowful eyes said it all. Why, brother, why?

Because the heart, out of its own caprice, chooses whomever it pleases. And the body, forever entrapped as its slave, forever the victim of impulsive whim, fulfills its every desire.

He looked down at his hands, and realized that he had comitted not one, but two of the most shameful sins of human existence.