Puppy Love at Mistletoe Junction: A Novel - Shannon Richard

From the author of Dog Days Forever, a heartfelt, holiday contemporary romance perfect for fans of Jill Shalvis, Kristan Higgins, and Susan Mallery, in which a young woman returns to her small hometown and ends up fostering a pregnant dog with—of all people—the man she used to love.
Lucy Buchanan and Theo Taylor have never gotten along.like ever. Not when they were children, not when they were teenagers, and definitely not as adults.though that last part might be more Lucy's doing than Theo's. It was the summer after she graduated college when their antagonism towards each other boiled over into something... hot.
That is until Lucy left town in a flash, leaving everything behind for warm Los Angeles. But now she's returned after seven years following a bad breakup, and a newfound disillusionment with La-La Land.
As for Theo, he doesn't know and doesn't care about whatever happened to make Lucy come back. His lingering resentment is enough to keep her at arm's length until she inevitably leaves again. The problem is, being around each other has proven that their friction isn't going anywhere, especially when it leads to some pretty intense heat.
The two have no idea what they've rekindled, but things get even more complicated when they rescue a pregnant dog together, taking on joint responsibility of caring for her.
Lucy and Theo must find a way to overcome their past, first for the sake of the dog and her litter, and for their own wounded hearts.