On the 13th of every month, the witch demanded the potent power of her sons seeds, because through them she could remain beautiful - forever. She refrained from using any dark magic during the ritual. It was important to her that the semen was given away
"The devil’s grip tightened as his daughter writhed in pain, her lips curling into a twisted smile. "Don’t enjoy it too much," he warned, his eyes sharp, "pain is a tool, not your pleasure.""