A Gentleman and a Soldier by Cindy dees

She was supposed to hate him.... Ten years ago Mac Conlon broke her heart... right before she nearly lost her life. But with the lethal assassin who'd tried to kill her back on her trail, Susan Monroe had nowhere else to turn. She entrusted herself to Mac's protection and willed herself not to lose her heart all over again. She was the only woman he'd ever loved. And his need to protect her overrode every reasonable, logical bone in his body. Mac just hoped he could remain sane enough in her enticing presence to do what he'd been trained to -- keep them both alive.