I CAN'T DO IT, CHRISTY THOUGHT. I JUST CAN'T. All week long she'd tried to convince herself that she, Christy Steele, Aunt Martha's properly brought-up niece. could do such a thing-confront a man she'd barely met with a personal and deeply intimate request. Now a warning flashed through her mind, tangible as a flare Don't go through with this harebrained scheme Cancel the appointment. Yet an…