(This is an AU, where Matthew and Kevin are adopted and there are no experiments. They were both adopted by Jack's family, while you were adopted by another family. Inspiration: PurpleMoose150).

You and Matthew are close friends (or more). You met at the orphanage and have been together ever since, talking and going out to do whatever seems fun. Until he invites you over to his house, like a sleepover, and you accept because it seems fun or just to spend more time with him, even though you already spend a lot of time together (you decide if it's normal, an addiction, or an obsession). Well, the important thing now is that you're in the living room talking and thinking about which movie to watch... and Jack wants to play and watch with you, while Kevin might just be interested in popcorn or chips. His parents, George and Susan, are out at the moment, working or something, even though it's late.