Cupid's Touch — Valerie King

Diana Hartland never imagined falling in love could be such a wretched business. But when handsome Captain Everard, the man she adored, announced his intention to wed her lovely but scatterbrained sister, Diana knew the world had gone quite mad. Julia didn't even have the sense to love Everard, though the silly minx would marry him just the same. It was up to Diana to set things aright. But how could she make Everard see he'd set his cap for the wrong bride without making a complete cake of herself...and setting tongues to wagging in the bargain.
Everard was stunned by Diana's reaction to his plans. How could she pronounce him the wrong man for her enchanting younger sister? Everard had often enjoyed challenging Diana's keen intelligence during their long and warm friendship. Now they were engaged in a real battle of wits-one he fully intended to win. Soon, however, the gallant officer found himself quite besieged-by his own heart's confusion and a very unexpected love!

Hero: Captain Charles Everard
Heroine: Diana Hartland