Orphaned at a young age, Layla Llewellyn feels like the luckiest girl in the world after she moves in with her uncle Bill, a gardener who lives on the scenic Arvis estate in the Berg Empire. To Layla, Arvis seems like paradise; she loves to explore the vast forest, always bringing her notebook to record the wildlife she encounters. She especially loves the birds, watching them with awe as they hatch and grow from fluffy chicks into beautiful birds. Duke Herhardt, the young, handsome lord of Arvis, is also interested in birds-and in Layla. But the difference, is he's interested in birds because he likes to hunt them... and he's interested in Layla because he likes to make her cry. If a lovely bird is trapped in a golden cage, which will she choose: a life of luxury, or freedom?

Based on your search, this phrase likely refers to the novel/story "I Only Need The Duke's Child" (also listed as "After Regressing, My Second Marriage to My Ex-Husband was Solely for Pregnancy"). Here is the description of that story: Plot: The main character, Blair, dies a tragic death, regresses in time, and marries her ex-husband, the Duke, specifically to have a child. Conflict: She plans to leave immediately after becoming pregnant, seeking only to have the child rather than rekindle their relationship. However, the Duke becomes unexpectedly cold and obsessed, insisting she stay. Characters: The Duke is described as someone who treats her differently in this second life, while she tries to keep a "contract" mentality to protect her heart and secure the child she desires.