Kiss and Kill, by Richard Deming (epub/Kindle/pdf)
He had found her in a quiet bar -- a sulky-mouthed, awkward, green-eyed kid trying desperately to pick up a man. He taught her how to dress, to walk, to laugh, made her into the kind of woman who makes every man reach into his pocket for hundred-dollar bills.
Looking at her now, Sam was proud of himself. He had done a good job on her.
He was almost sorry she had to die...