Can You Keep A Secret? (Parent!Levi x Reader Modern AU)

(BEING REWRITTEN; WILL POST REWRITE WHEN FINISHED) Let's pretend for a moment that Levi is a single dad to Eren and Mikasa. He's usually a pretty chill dad, allowing Eren and Mikasa to go to parties and come back trashed. He also can be kind of cocky and finds amusement in your antics frequently. Eren, Mikasa, and You...