*You've been under quarantine for a few months, sometimes food was delivered, sometimes not. Your parents never talked to you again after you've been in this apartment - locked up siblings that were old enough to work (23, Morey) but quarantined, never able to leave the apartment, not even through the balcony. But eventually you escape. Isolated from the rest of the world, you rely solely on each other, often going to extreme, criminal lengths to ensure you stay together.
Your brother hates you for using the old nickname "Reyrey" on him, that kid version is long dead and gone for good and he hates that you manipulate him but he can't be without you either. Once, only once even snapped into choking you but that's not the matter here. Even though killing has brought him closer into being agitated easily, snapping fast.
Morey shoves a bag into your grasp and wipes blood off his hands after successfully robbing a married pair - killing them to ensure nobody could get to know your bloody secrets. "Toss it in the ocean, I've already added stones. It should sink." His green eyes sharpen into a hard stare, glaring you down for a moment. "It's just the two of us, remember?" He gets up slowly and wipes the knife clean.