Tell her the truth about the Notebook.

"Fine, I'll tell you the truth," you say.

Sadie eases off but doesn't let you go. Trying to get away is probably a bad idea anyway.

"The notebook... I know this is gonna sound strange... can change breast sizes."

"What? Are you drunk?" She twists your arm harder.

"Ow! I'm serious! Look in the notebook, you'll see names and... well... "

She lets you go and looks through the notebook, leaving you to slide down the wall. "Hey! My name's in here."

"Yeah... about that."

"W-wait... somethings weird... I..." Sadie rubs her forehead like she's being assailed by a bad migraine. "Why do I know about this? It's like I used to have... no, that's not quite right."

You stand up and watch her carefully. Something's weird about her. The Notebook is having another effect, something you didn't count on. "Are you alright?"

"I'm fine... but... I feel like I know you're not lying." Sadie offers you the notebook. "No fast moves but... I want you to show me how it works."

You take it back slowly, working through the situation at hand. She doesn't seem mad at you. "You mind if I ask you a question first?"

"Fine. Just make it quick."

"What's happening to you now? Why do you believe me?"

"I can't put my finger on it, but I have like... two pasts. One where I had boobs, like B-cups or something. The other I--" She flushes pink. "Hey! You're just trying to trick me into--"

"I already know. The notebook can tell me your size. It can also change it. You wanted honesty, so here it is, I wanted to learn more about the notebook, and after chatting with you for a bit, I came to the conclusion you take Track really seriously. So... I thought of a way to kill two birds with one stone. I figured if I made you flat-chested, it would make things easier for you."

"What? You made me flat chested?" She grabs you by the collar. "You have any idea how embarrassing it is to get absolutely nothing from puberty? Do you? But... wait... that can't be right. You couldn't have done something to me so long ago. I don't even know you."

You keep your cool. For some reason, her frantic nature only arouses you. "It's just how it works. I just need a name and a size. If I wanted to, I could have just changed you without asking anything about you, but I was just trying to help. "

"F-fine." She lets you go. "I would say 'put me back to normal'... but now that I think about it, there was good and bad with both situations."

You smirk. "So in short... you aren't happy with either. How about an upgrade then?"

Sadie goes beet red, glancing between you and the notebook. "It sounds so weird when you say it like that."

"The whole thing is just plain weird," you say. "Got a size in mind?"

"I want to be huge," she blurts out.

This catches your attention. "Huge?"

"Y-yeah. D. No, Double-D." She juts her chest out, like it would help somehow.

You manage to avoid laughing. Double D isn't exactly huge... but... "You sure?"

"Positive. And afterwards, I'll show em to you to make sure they don't look weird. N-not here, though. Where's that room you were leading me to?"

"Just down the hall," you say. "Last door on the right."

"You go first." She waves you to move down the hall. "I just want to make sure you don't do anything sneaky."

You raise your hands like she has a gun trained on you. It lets her see the notebook clearly. You walk slowly to the room, conscious of your heartbeat. It's racing. You have a girl willing to help you try out the notebook, and she's even offering to show you the handy work. It's hard to complain about the circumstances, really.

You step inside and she follows, taking a moment to close the door. There's a large comfortable looking bed, just aching to be used. Maybe she'll be more receptive after some changes.

You turn on the spot presenting the notebook.

Sadie folds her arms and stares you down. "Do it."

"As you wish..."