The Wounded First Prince Dotes on His Half-Sister

A story about an overprotective older brother. With a serving of comeuppance on the side. Clovis is the first prince, but unfortunately has no siblings. Having lost his biological mother and feeling lonely, Clovis learns that the queen, his stepmother, is pregnant. Clovis dotes on his newborn younger sister. It seems his beloved sister has gotten engaged. Clovis secretly observes the first meeting between the two of them... Also posted on Alphapolis. I was unsure about the genre, but I'm changing it to human drama. If this is the wrong genre, I would appreciate it if you could let me know.