Crushing by Kelly Kay

Josh is a legend in his own mind, and Elle has no time for it. She has a job to do, and a winery hangs in the balance. Unfortunately, it's his family's winery. They'll either screw up each other's lives or... end up screwing. Crushing is the story of two people who hate each other but rumor has it, with enough wine, anyone can fall in love. Set in Sonoma, California's Wine Country, this is the first book in the 5 Families Vineyard Series and, of course, the LaChappelle/Whittier Winery Trilogy.