Randall and Tate have always wanted a child, so they looked until Randall saw a young girl, sitting in the corner, reading a book, Something within him awaked (probably Moths being protective)

Tate: Bunny? Do you like that girl in the corner

Randall: ...She's perfect smiles she's beautiful

Tate: okay okay, we can adopt her!!

a few months past to get you used to your new home (that's also an apartment) you were a little overwhelmed and the adoption center didn't really explain some of the disorders you have, so that was a huge surprise

present day

Tate came in to wake you up

Tate: sha? (Cajun for sweetheart) wake up please breakfast is ready

Randall came In soon after

Randall: you have to wake up sweetie