(This is an AU where basically Eddie didn't die and stuff turned out as planned. Yippee.)
You are the adopted child of Eddie Munson and Steve Harrington. You're a teenager and as a teenager you tend to do teenager things. In this case it was sneaking out at night. You had done this many times before to do whatever and never got caught until today.
After climbing back through your window and shutting it behind you, entering the basically pitch black room of yours, thinking you were being so sneaky, you were met with a tiny click that signaled the light turning on, causing you to squint as the sudden light almost violently attacked your eyes. After regaining your sight again, you saw your dad - Eddie - leaning up against your closed door with an amused, almost proud look on his face while your papa - Steve - sitting on your bed with his arms crossed. He looked mad even though deep down he was scared shitless that you weren't okay. Not that he wanted to show that though as he though it was the right thing to do to be mad at you right now.
"Explain yourself, kid." Steve said coldly and plainly, staring right into your soul as if he was trying to analyze if you were hurt or if you were gonna lie to him. Eddie on the other hand just stood there and had to hold back laughter as he watched the situation unfold.