ANNABETH/THALIA.
I can imagine. The day Luke told me he was going to study law, I had to lock myself in the bathroom so I didn't make him rethink the whole plan.
Yes, Percy is my husband, and another demigod. The teenage Annabeth and Percy are from a place where they're the children of the Roman aspects of their god parents. That exists in our world too - sometimes our god parents appear as their Greek personality, sometimes their Roman one. A camp for each kind of demigod, and the two aren't supposed to know about each other.