Her Secret, His Surprise (Entangled Bliss) / Paula Altenburg,

Conflict of interest is an understatement…

Since being disowned by her strict father, Cass Stone has spent her adulthood trying to prove him wrong. Her drive has led to more success than her family ever thought she’d achieve, and life is looking great. Not even an incredible and mysterious one night stand that leaves her a single mom can trip her up...until the father of her baby stumbles back into her life, as sexy and unreliable as ever.
 
Logan Alexander hasn’t forgotten the night he spent with Cass two years ago, but he never expects to end up undercover as her assistant. His job saves lives—like it should have saved his brother—and he can’t afford complications. It’s difficult enough to maintain his cover as a carefree wanderer when he realizes his attraction to Cass hasn’t faded...and then he meets Cass’s daughter.