Sandra Brown's Led Astray & The Devil's Own are the two novels in the Astray & Devil series.
Sandra Brown - Led Astray & The Devil's Own book description:
Mourning her fiancé's sudden, tragic death, Jenny Fletcher found a surprisingly sympathetic friend in his brother Cage. She'd always considered him too wild and reckless…until he brought out a wild side of her that she hadn't known was there. And now that she'd been led astray, she couldn't possibly turn back….
The Devil's Own
Kerry Bishop prepared for danger when she undertook a mission to rescue nine orphans from a war-ravaged country. But she didn't prepare to lose her heart to the man on whom their very survival depended. She'd tricked Linc into helping her, misleading him about her identity. When and if they reached freedom — would their love survive in spite of her lies?