Haunted Souls - Kathryn Knight

Four years ago, Emily Shea and Staff Sergeant Brett Leeds agreed to part with no strings attached. Sparks flew during their brief affair, but fate intervened, sending Brett overseas. When an unexpected pregnancy derailed Emily's own plans, her attempts to locate Brett were soon overwhelmed by the challenges of single motherhood. Now, Brett has returned home, and Emily is forced to share her secret. 
Despite feeling betrayed, Brett is determined to forge a relationship with their son, Tyler. As the former lovers battle both their inner demons and their mutual desire, another presence enters their lives—Tyler's imaginary friend.
Soon, however, the chilling evidence points to a different conclusion: a ghost has formed a dangerous connection with their son. Emily's attempts to help both a lost soul and a friend in need spiral toward a deadly confrontation, and Brett must race to save Emily before he loses her again—forever.

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Emily is a single mom and the man who's the father of her son is back and stationed in his hometown, also where she currently lives.  Her son is sensitive only until they visit a haunted jail she doesn't realize HOW sensitive.  Brett is back after a tragedy overseas with his EOD crew and he's shocked and angry to find he's had a son and had no clue.  

I enjoyed this unique romance with paranormal elements.  Emily's son, Tyler is fun and a great character for being the medium between their ghost and Emily.  Brett and Emily's love story is explosive and entrancing from the current events to the bits of flashbacks throughout the story.  Though they both feel they have to be forgiven for past events in their respective but separate years they both yearn for redemption and forgiveness.  If you're looking for an enchanting romance that's so sexy it will have you running to the closest cooling source then I highly recommend Haunted Souls!