66% has nothing to do with its offspring.

a 66% means it has a 66% of being het, they are eigher het or not, no inbetween.

you get the 66% from breeding a het to a het. the break down turns into 25% visual, 50% het, 25% normal. but you cannot tell the difference between the hets and normals so out of the normal looking ones 66% should be het.

so to answer your question, your animal has a 66% of being het, if it is het, 50% visual, 50% het, if it is not a het, you will get all hets.