Comment by MeLikeyMuscles on Arelyn Is Sick and Tired - Chapter 47

@MeLikeyMuscles Arelyn Halbern is publicly recognized as a daughter of the Halbern Grand Duke's family.
Her biological mother is Sione, who was Valer/Valer Shilun Halbern's sister — meaning Sione was a member of the Halbern family.
Sione was forced into an unwanted marriage with the Grand Duke of Locke, who was from the neighboring Albrehart Empire.
Sione was physically weak and suffered badly during the marriage.
Arelyn was secretly born from that marriage.
However, Arelyn was raised/recognized as a Halbern family daughter, rather than publicly being acknowledged as the Locke Grand Duke's daughter.