Cardinal Sin — Margaret Tanner

"One bloody night," Bryce Harrington thought savagely, "and this happens." He had committed the cardinal sin of getting his secretary pregnant, and now he had to pay the price -- offer marriage. Caroline Dennison had committed the cardinal sin of falling in love with her boss. While her brother risks his life in the jungles of Vietnam, and her friend, a draft dodger, is on the run from the authorities and needs her help, Caroline has another desperate battle on her hands, a battle to win Bryce's love.