Oksana has spent her lifetime trying to restore her mother's legacy, and the fey who stole it happens to be her ideal mate. Well, that is what the seers tell her. She will see for herself, but she isn't handing over her hand in marriage until she gets her mother's belongings back.
Hyther thought that a dead dragon meant the artifacts were up for grabs. He has since found out that dragons can hatch from eggs, and they have a long memory.