Tell Nathan the truth

Alex shakes his head, muttering for a moment before he can get any real words out. "No, Nathan, I'm not some random girl. I am Alex!"

Nathan raises an eyebrow, looking Alex over a bit, then chuckles. "That's a weird joke, babe. You couldn't really expect me to believe that, could you?"

"I know it sounds crazy, but it's true," Alex says. "I can prove it, ask me anything that only Alex could know, and I can answer it."

Nathan leans against the door frame, smirking as he thinks. "Alright, I told Alex about something shitty that happened to me last weekend. What was it?"

"You were with Carrie, and she was going down on you. You had your phone in your pocket and managed to accidentally dial your mom. She ended up hanging up after a few minutes of the noises and then spent the next hour calling you and reamed you out when you finally answered."

Nathan stops leaning against the door frame, a look of anger flashing across his face. "He fucking told you about that?"

"No, you idiot. I know about that because I am Alex!"

He still looks angry, but his eyes scan Alex and the room, apparently trying to come to a decision.