I am not qualified to practice law in your state but I do have a law degree and a modest idea of the law normally applicable in this sort of situation.

You're not entitled to anything. As a matter of courtesy you'd expect a bottle or some similar present, but that's not a matter of entitlement. Why not just be happy for her? Presumably she is/was a friend and presumably you've photographed people the same way and entered competitions too. What would you give them in the same situation?