User blog comment:Lao123/Demigod grandparents/parents??/@comment-745324-20101223215344

According to Rick Riordan, if a demigod marries anyone (even another demigod), the godly powers would dilute. That means that their kid would be more mortal, and may have almost no or very minor powers. He mentioned that if the two demigods are very powerful, then the child may have some powers, but would never have as much as a regular demigod.