Proving a Poss Het...

[The Serpent Merchant]

Very true. But the offspring from the first clutch would all be guaranteed 100% hets since dad is a visual, and it wouldn't necessarily prove mom as a het.

But that's not the point. You now have a guaranteed 100% het ready to breed. The 50% het is now obsolete, and if the original female hasn't proven out yet chances are it's time to throw in the towel. Sure it's still possible, theoretically a het could never pass on the het gene. it's extremely unlikely but possible.