Title: Accidental One-Night Baby
Description: Having watched his father lose everything to a woman, Italian billionaire Vincenzo Giansante has spurned romantic relationships. Naturally when one-night stand Siena claims she’s carrying his child, he insists on a paternity test. And when it’s positive his powerful, primal reaction shocks even himself. He demands marriage to secure his heir!
Independent Siena Westbrook won’t be beholden to a man who accuses her of gold-digging! She declines his diamond. Yet she can’t forget their electrifying night. And the harder Vincenzo campaigns for Siena’s hand, the harder it is to resist a repeat encounter…   

 IMHO, not quite as bad as the GR reviews claim.
Note:  alcohol had a significant role with his decision to sleep with her the 2nd time  (whiskey goggles?)
People: Vincenzo Giansante, Siena Westbrook