"I understand. I will do it, Grandfather," said Ye Xiajie.
This is the first time he called Hei Mo grandfather. As Hei Anjing's Husband, all of his wife's elders would be his elders regardless of their past relationship. This is why no matter how much he hated Mo Baojun he wouldn't think of killing him like before but cursing him openly would be normal.
Hei Mo was stunned for a moment. Upon hearing this ruthless Evil God who only does things for his own ego lowered himself to call a mere Celestial God-like. Hom shows how much he loves his grandson.