Why You Should Never Kiss Your Enemy — Erin Nicholas

An antagonists-to-lovers, grumpy-sunshine, surprise pregnancy rom comThe last thing single dad and surgeon Nate Sullivan needs is more stress and distraction in his life. That makes his best friend's gorgeous, mouthy, doesn't-respect-schedules, hates-authority, has-no-boundaries sister a huge threat to his carefully balanced life. Nate is the kind of guy Emma Dixon hates: buttoned-up, rigid, his-way-or-the-highway. So why is he the guy she can't quit thinking about and who she most loves sparring with?They're like oil and water. But when they're thrown together on opposites sides of a project--Nate trying to keep his son from falling for the wrong girl and Emma playing cupid for the couple- they find they're more like gasoline and a match.