The Billionaire's Forbidden Secret My Sister's Baby Daddy

An influential metropolitan billionaire unexpectedly crosses paths with his long-lost first love, who now practices medicine as a distant and guarded obstetrician suffering from severe amnesia. The tycoon has searched years for him, yet the doctor recalls nothing of their shared romantic past.

Tensions escalate when the billionaire discovers an astonishing complication within his own household: the unborn infant his sister carries through an anonymous donor clinic was fathered by the very physician he sought. As medical duty and old emotions clash, long-hidden secrets come rushing to the surface.