If one ignored the difference in Cultivation, Celine and Eris could be grouped in the same generation as Zuqin. This would confuse their relationships if Lucian treated Zuqin as his wife in his harem.
Moreover, Zuqin was proud and certainly wouldn't accept this. She wouldn't call Celine or Eris mother or mother-in-law. It would mess up the whole relationship.
So from the start, Lucian wanted to give Zuqin the same status as Celine and Eris.
Therefore, when Zuqin asked him, of course he wouldn't disagree.
At this moment, looking at Zuqin, Lucian chuckled softly. He could tell that this was the first time she used such words, and it amused him greatly.
Pink strands of hair clung to her sweaty forehead, her heterochromatic eyes glowing with raw lust.
As much as she wanted to show gentleness and motherly love, her voice was still slightly cold.