Anne McAllister 
One-Night Love-Child [EPUB ebook] 

It was one night as hot and passionate as only young love can be. But they left it at that. Flynn had the world to conquer-alone. Only three months later, Sara’s life changed: she discovered she was expecting Flynn’s baby. Now Flynn has taken his rightful place as the Irish Earl of Dunmorey.But once he discovers that he also has an heir, his strategy is simple: claim his love child. He wants his son, and he wants Sara, too. . . as his bride.