Ladder of Flesh by Sloane Britain

From the back:

They all got in the act:
Hallie, the playwright: She didn't know which way to go so she went both ways.
Eliot, the director: He was a frustrated stud in a den full of Lesbians.
Carol, the ingenue: She would do anything with anybody to land a role, but she wanted Ellis.
Ellis, the star: She was on top and would do anything to stay there, but she wanted Carol.
Wanda, the angel: She had money and used it to buy her peculiar kind of love from Carol and Ellis.

The naked truth about what happens when the lights go out on Broadway and strange women are on the prowl.