The Greek Billionaire's Baby Revenge (Harlequin Presents, #2690)

His mistress... Working for Nikos Stavrakis was exhilarating--until one night, when he made love to Anna.... His baby... Anna believes Nikos is unfaithful, and flees. Nine months later, she is left nursing a tiny baby.... His wife? Nikos is furious when he discovers Anna's taken his son. He vows to seek retribution! He will make Anna his bride, and teach her who's boss!