Filling Plot Holes?

Everything was falling into place.

Immortal bloodlines, this was the missing piece Xu Feng needed in this mess. 

This was the second and most likely the most important reason Lady Xuan willingly married her only son to some village ger. 

It didn't make sense for Xuan Yang to agree to marry Xu Feng just because he was more masculine looking than most gers. The young master was clearly very stubborn and Lady Xuan was a woman from high society—she would only want the best for her son.

Xu Feng was the best in status, but in bloodline he was pretty good for the Xuan's to agree to this fake marriage. Even Xuan Yang begrudgingly agreed.

Know knowing Xuan Yang, Xu Feng understood that a child was probably the last thing on his mind. The Xuans must have something over the love sick pervert to make him agree to the union between them.