Forever Ours by Jennifer J Williams

When her life is falling apart around her, Harper Williams calls the only person who can help her. Owen Taylor is the bane of her existence. The guy she’s crushed on most of her adult life. But once he opens his mouth, all he does is argue. Which is why she’s never attempted to act on her little crush.
Owen Taylor has always found Harper Williams attractive, but he’s never acted on it. That is until their arguing gets out of control, and he shuts her up with his mouth. Once he’s tasted her lips, however, no one else compares. Owen knows Harper is in trouble, but she won’t open up to him. Harper is one heck of an independent woman. But when she’s forced out of her apartment, Owen demands she move in with him.
Neither Harper nor Owen realizes there’s already a significant connection between them. A life-changing complication that neither was prepared for. It forces both Harper and Owen to own up to their feelings for each other and what they want for the future. Because nine months can go by in the blink of an eye.