Light To Valhalla by Melissa Lynne Blue
Charlotte Rawlings has been over the moon in love with her husband since the age of five. Such shouldn't be a problem except that he is married to his military career not to her. When Alexander Rawlings, the Marquis Coverstone, suddenly returns home, intent upon making amends, the desire to realize her greatest dream and make their marriage more than "in name only" is a delicious temptation. However, she cannot help but doubt his intentions. For years the dowager marchioness has petitioned for her son's discharge from service, and when a close family friend informs Charlotte that Alex will in fact be discharged if he doesn't produce an heir, her suspicions are confirmed.
Wounded in battle and accused of murder, Alex, returns to London a half step ahead of raucous scandal and powerful enemies set on ruining him. When his wife is taken hostage and held for ransom, Alex knows past sins have caught up with him, and concern for his own safety falls by the wayside when he realizes Charlotte has become the target of his enemy's revenge. Intent upon protecting his wife, Alex works to assuage her doubts and quickly realizes that he will not settle for simple surrender... he will only be satisfied once he wins her heart. But as rumors of infidelity and murder drag Alex and Charlotte into a dangerous mire their tenuous bond threatens to snap. Can the bonds of trust be renewed or will those intent upon revenge and destroying the young marquis succeed?