A Lust for Danger — Margaret Malkind

Their brief encounter was flash-fire passion shared in the face of death. Sylvia Goddard hadn't even seen Hank Weston's face as they hid in the dark hut, escaping the gunfire of the Paraguayan police. She knew only the comfort of his hands, his kind words before their parting. They were not to meet again until the occasion of a formal garden party, where Sylvia was drawn by instinct and desire to the mysterious soldier of fortune. His face, name, and mission finally revealed, Hank inspired fear as well as love. The intimate stranger warned her of danger, of friends she could not trust. But what of him, the man who'd assaulted her senses and stolen her heart away?