That is correct, if she proves out the odds per egg are 1/4 Carmel, 2/4 Het, 1/4 Normal.
If you get no visual (Homozygous) offspring then they would all be considered 50% hets. Though I would try additional breedings with the 100% male, just incase you missed the odds on the first season with her. If she proved out the second or third time around then all of the normal looking offspring from previous years would then be considered 66% hets until proven out themselves.
Better yet if you get a Visual (Homozygous) Male from the 100% X 100% breeding grow him up and use him to prove out any hets including your current 66% if she has not been proven out yet. Doing this all offspring would atleast be 100% hets.