A Siren for the Duke by Hazel Linwood

The voice asking for his help… the song claiming his heart…
Lydia’s life has taken a turn for the worse. With her father’s sickness, her family is on the verge of bankruptcy, yet she still refuses a loveless marriage as her only solution. So she takes another route leading her to their creditor, the Duke of Whitewell.
Neil was not raised to show sympathy. But seeing Lydia in distress forces him to discover new feelings and his assistance comes in the form of an invitation. What better chance to find a wealthy match than his house party?
Until Neil hears Lydia’s lullaby. The familiarity in her voice brings to the surface an affection he had long forgotten. But the moment their love is about to blossom, Neil sees darkness looming over his beloved. A hidden foe plotting against their bliss and possibly their lives…