Finding Our Destiny (Fairy Tail FF)

Sara and Haru are twins. They used to have it all, A lot of money, a big house, a mother.. They've been living on their own with their younger twin siblings for years, doing everything they can to make sure that their little brother and sister have a good life... Even if it mean stealing valuable things from their townspeople that they love with all their hearts to sell and make money.
When the townspeople reach out for help, out of ideas for capturing the dark thief, Fairy tail swoops in. Sara and Haru are shocked to see that one of the Fairy tail members is one of their family members. Sara and Haru's memories were somehow altered years ago, but they don't know that, obviously. All that they have of their mother is their siblings. And they'll do anything to keep them safe. Anything.