Sin Doll by Orrie Hitt

'There might have been hope for Cherry, for one man, although active in a foul racket, truly loved her. By this time, however, she was blunted to ordinary morals, commonplace desires. One day he found Cherry in the arms of a redheaded Woman.!'

First line:
' Cherry Gordon sat alone in the center seat of the nearly empty bus; she was going home.'