My best friend is my twin brother??

What if posiden broke the two times with the same person after two years and had twin girls.
Eden and Morgans are twins there dad told them that there mom and there mysterious brother died in a plane crash and then he left just like that. 11 year old twins left alone go throw hard times but mange to survive 1 whole year with out killing each other. Then a boy named Nico de Angelo saved them from a cyclops. He took them in for three months and right after there birthdays he left with out telling them. They then again survive 2 years alone and Morgana being the tall one gets a jod and works gets enough money to pay a car and pay for there three room apartment for three years. What will happen when they go to a new school and find out that they are demigod?
FIND OUT WHEN YOU READ THIS FAN FICTION