Otherwise Alone - Evan Arden, #1

Former Marine Lieutenant Evan Arden sits in a shack in the middle of nowhere, waiting for orders that will send him back home-if he ever gets them.  Other than his loyal Great Pyrenees, there's no one around to break up the monotony.  The heat is unbearable, but he makes do with the little he has.  He's accustomed to harsh conditions and simply exists as best he can.  The tedium is excruciating, but it is suddenly interrupted when a young woman stumbles up his path.
She's lost; she's cute, and he can't resist the temptation of luring her into his bed.  Why not?  It's been ages, and he is Otherwise Alone.