Get Uma a little sister in the descendants 3 between the ages of 11,12,13,and14

I'm not really concerned about anything it's just that I think uma having a little sister in descendants 3 will make for a good addition to my always says she has no one supporting looking up to her well now she will please sign my petition for Uma to get a little sister in descendants 3 p.s her name can be ursa or whatever disney chooses