I could tell I was getting on Dex’s nerves. He kept closing himself off in other parts of the house. He claimed he had to work, but I walked in on him once and he didn’t even have his computer open; he was just screwing around on his phone, either playing some dumb game or texting, I couldn’t tell. When he saw me, he set the phone down, fast, guilt on his face: a little boy caught messing around when he was supposed to be doing his homework.