Is it sad that you lost your fire? Yes ..Are you entitled to anything once the transaction is completed and both parties are satisfied * with the said transaction? No
*And you were both satisfied until a clutch was laid.
Now if you have had a contract stipulating that the female was sold as gravid and that once eggs had hatched the clutch should be split that would be a whole other story.
A business deal is business deal whether dealing with big guys or small time breeders, and an act of kindness is an act of kindness which means nothing should be expected in return.