Lost Cause by Janice Kay Johnson

Gary Lindstrom doesn't remember ever being a child named Lucien. So when his long-lost sister calls to remind him of who he was, he tells her he's not interested. But even he can't resist the pull of the past, and he goes to meet the only family he has left. Little does he know that he's also going to meet Rebecca Wilson....
Rebecca has never met anyone like Gary. He's attractive and successful, but determined to go through life alone. His first attempt at marriage was a bust and he doesn't want kids. She knows there's no future for them. But how can either ignore what's developing between them?