The baby brother of ASL

Shanks and Mihawk were one of the strongest and most influential pirates in the whole world.
However they too had a being that they both would gladly lay their life down to... their son. The son of their most beloved women. The women they had not been able to protect.
Sebastian Dracule, their precious son and nephew that had been ripped away/kidnapped from them when Sebastian had only been three years old.
For seven whole years, the two heart-broken father and uncle had never stopped searching.

Ace, Luffy and Sabo had a severe little brother complex, to their baby brother, Sebastian that they had found lying on the beach when the child had only been four. At that time Sabo, Ace had been 13 and Luffy had been ten.

* doesn't the follow any of the plots or timeline of the story *