Ellie was your cousin. Her parents Joel and Tess were your aunt and uncle, and you were-

A liar. A conman of all things. You had just gotten out of prison for fraud, and your annoying cell mate had made it their mission to tell you every single detail of their life. Including the family fortune their aunt and uncle had.

Now, here you were. Trying to get it by pretending to be your cellmate who had been missing from the family for years out of the blue.