Xia Feng was aware that Miss Nula fell for his body.
It was surely because he had engraved a deep impression with his erossu weapon! It was so deep surely not only because it was the first time of the lady, but because he was that good, and so his body.
Furthermore, Miss Nula surely had done some research and realized that Xia Feng is that special. He has a strong water cultivator body, so his meridians might be special! There is a high chance his meridians had yet to awaken or get utilizied thoroughly.
It was a thought, but this mere thought had so much potential she felt like being Xia Feng's wife is actually her greatest 'luxury'.
If her descendant ends up being born with a special meridians too, then the future is simply too good for her.
That's why, Miss Nula began preparing Xia Feng to be that real man.
His body is so good, but the personality not so!