He held her for a minute, watching the blood slowly seep out. He would have liked to spare her life, to toy with her for a while, but drastic times called for drastic measures, and he simply couldn't afford to let her live.
As he watched, blood seemed to lessen and after a while it stopped pouring from the wound. Then, as he watched, it seemed to start retracting itself, back inside her body.
The smile on his face disappeared. Maybe his age was finally starting to catch up with him. He blinked. No, the blood was definitely disappearing, and the wound was starting to close itself up.
He stared in disbelief. Suddenly, her eyes opened and her head came up. She looked at him and smiled with an eerie innocence.
"Surprise"
Without warning, she kicked him in the shin and freed herself from his grasp. Before he could lunge at her she grabbed his arms and twisted them behind him. After pinning him against the wall she wrenched the harpy from his grasp and held it at his throat.
He couldn't believe what was happening. Never in his life had he anticipated something like this. Every move he made was carefully planned and prepared for and now things were out of his control. He tried to free his arms but she was much stronger and he found he could not move.
She held the harpy at his throat and looked into his eyes. She breathed in his fear and smiled.
"How…" his voice trailed off.
"You can't kill something that was dead to begin with."
Her eyes become a shade of yellow, not unlike those of black cats, and they pierced him right to his soul.
She pressed the harpy harder into his throat, causing him to flinch. She leaned forward.
"Goodbye"
He closed his eyes and felt her lips connect to his for a fleeting moment.
When he opened them again, she had gone.