Question, tho. If he let him married LXW's mother, there wouldn't be a "Li Xiaowei". He might will be named as "Tang Xiaowei" or even "Tang Nazhi". Then, would their father still marry our TNZ's mother? Even if he did, would our TNZ be born? He might even refuse to touch TNZ's mother because he didn't want to hurt LXW's mother. And some people might still say the grandfather is very cruel for making their father has two wives.