In this scene, Adam and Kristina are high off crank and Adam is attempting to take things further. The "crank" was controlling the two and making decisions for them. The drugs took them over and before they knew it, they were in a situation they hadn't aimed towards.
"The monster-fueled(drugs) thigh to belly button inferno built Adam's mouth moved by trembling inch lower, inch" (163)
In this scene, Bree (Kristina) comes home to her mothers and begins to come to the conclusion that there are drugs she could get her hands on. The "crank" is the only thing on her mind, even after coming home to her mothers. The drugs begin to overtake her, controlling her thoughts, and before she knew it, the drugs are controlling her after she comes home.
"...crank in Reno, Waiting for me, calling out to Bree. All that was left was to find it." (214)
In this scene, Kristina comes to the realization she is hooked on nicotine. She claims she hadn't come to the conclusion she was hooked on nicotine until she couldn't have it. Even before Kristina knows it, she was hooked on nicotine and it overtakes her to feel she needs it.
"Nicotine's a strange addiction. I didn't even realize I was hooked until I couldn't have one. " (217)
I predict Kristina's mother is going to find out about Kristina's addiction and seek help for her. Then, Kristina will become healthy and free of addiction. Her mother is bound to find out about her addiction because she focuses a great amount of attention on drugs and is attempting to hide it under her mother's nose. Also, Kristina's addiction seems to increase in power but she is the main character, so I don't think she will die.