“Hill Girl” by Charles Williams. Gold Medal 141 Paperback Original (1951). First edition. Cover Art by Barye Phillips.

From the back:

 

It was obvious she had nothing on beneath the old cotton dress and that she didn't care a damn.

 

Lee was just looking at her. She could see what he wanted. I could feel the collar of my shirt choking me.

 

"She ought to be against the law," Lee said slowly and shakily.

 

"She is," I said. "And her father would kill you."

Done