The son of the turtle-spirit

After reading the tale, The son of the turtle-spirit', I enjoyed the story as it was entertaining, some sort of a love story. Furthermore, the language used in the text was rather simple, thus making it easier for me to comprehend. However, I did not like the maiden's character, in a way she was betraying her lover and caused his death. Instead of sewing thread onto his coat, the maiden should ask her lover personally in order to find out his origin. What she did was to trap him. Another thing that shocked me was the maiden and the spirit actually had a child. How can that happen? Spirits were not human beings.
The maiden's action was questionable when she asked her son to lie to the rich man and the grave-seeker by putting his father’s bones (the turtle) in the dragon’s mouth. I often thought that mothers were always the one who teach their children to do the right things and the not the other way round. Yet, the maiden’s intention to do it for her husband should not be criticized as it was part of the Chinese culture to find a good burial place for the deceased as it will affect the life of their children. In a way, the maiden wanted her son to have a good life. All in all, it was a good story to read for merely entertainment and cultural enrichment.