DIAGNOSIS: DADDY (3) by Gina Wilkins: Medical student Connor Hayes is shocked to discover he's a father, thanks to a recently deceased ex who gave birth and never told him. Taking custody of 6-year-old Alexis is only possible because Connor's best friend, teacher Mia Doyle, agrees to move in and help out. Living together makes them aware of each other as they've never been before. Neither wants to cross the line and risk what they have, but it happens anyway. They can't go back, but can they move forward? Although the story has a strong plot, it overshadows the romance -- not surprising, since there's not much spark between Connor and Mia until late in the book.