secrets of the past: a descendants fanfiction

What if Hades and maleficent didn't just have Mal? What if they had three children? Well that's what happened. Three years after Mal was born maleficent gave birth to twins Harley and Hadley and not to soon after their birth hades and maleficent got divorced and Harley and Hadley grew up being raised by their father. The twins never had a good relationship with either of these parents and the relationship with their sister was non-existent. After the fall of the barrier and after Mal and Ben get married and Mal becomes queen and Uma is made the new principal the twins and Hadley's only friend gavin are invited to auradon prep where they meet red the daughter of the queen of hearts, chloe charming and Elaine the daughter of elsa. What would happen when the queen of hearts stages a coup at the welcome party and the 6 children end up going back in time? Will they be able to stop the Queen of hearts from becoming a tyrant? And what will when Harley and Hadley see their parents?