They're second cousins once removed.Oh. My. Golly. AIDAN AND SHAWN ARE COUSINS! (Sort of. More like distant relatives..)
Poseidon- Brother of Zeus.
Triton- Son of Poseidon.
Ariel- Daughter of Triton.
Shawn- Son of Ariel.
Zeus- Brother of Poseidon.
Hercules- Son of Zeus.
Aidan- Son of Hercules.
So...
Shawn is, in a way, Aidan's nephew...?