Isabella and Rexie D'Escamilla's single mother had died of lung disease at an absurdly young age- and now it's up to Rexie to care for her beloved little sister. Before anyone goes thinking this is yet another Big Sister Challenge Setup- when Rexie's mother was on her deathbed, she gifted Rexie a simple heart pendant and promised her that her soulmate was somewhere out there, wearing the same one. What does this mean? Was she delusional, or could it somehow be real? #bigsisterchallenge