Facade And Fate: Saving My Boy Manga

After Raina gives birth to a boy and a girl, her husband Alexander suddenly demands divorce, acsusing her of infidelty and taking the boy Liam away. Five years later, Raina is back as a wealthy heiress when Alexander shows up to ask her for help. Liam is seriously ill, and only Raina can save him. But the boy's illness isn't simply hereditary. They must try to find out the truth.