[How come literally everyone but hyth and emet themselves knew. How could that happen.]

I am glad to be of help. When I spoke with him last night, he was quite distraught that you and Hades do not share your troubles with him, and that his attempts to comfort you are brushed aside while you fuss over him instead. So I do think being more open - even if it is about being unable to be open - would help reassure him. I suppose all three of you are rather similar when it comes to taking care of others and neglecting yourselves.