I just want to enjoy my wife

"No, you are not a monster," Luciana said gently, staring at him. 

"I am a monster, Luciana, don't you see it? My father hated me; he even called me a wild seed. After my mother's death, I found out I was a bastard son. My mother cheated on my father. I didn't want to believe my mother was capable of that at first, but I began to believe the rumors when I realized how I didn't look like my father or any of my brothers," he said. 

Luciana realized the truth of his words, and her eyes widened. Why had she never realized this? Maybe she had realized it but didn't put much thought into it. Yes, because it wasn't all the time that family members looked alike. 

Take herself, for instance; she didn't look like her late parents and her brother. So maybe she subconsciously brushed it off when Nicholas seemed to have been carved out from a different tree than the emperor, David, and the third prince.