Subtly refer the the abilities of the notebook.

"I got something pretty nice," you say. "Call it... a magic trick."

That seems to have peaked her interest. "Magic, huh?"

"Though, I mean, it might be useless for you. You're already a ten. Hard to improve perfection."

"Oh, ho... now you're just flattering me. That's bumped you up to an 'O.K.' chance. I love me some compliments. But seriously, what kind of magic trick?"

"A... fulfilling one," you say. "It's more like... i dunno... a genie's lamp? But it's sort of specific. If you're completely content with what you got, it's not for you. So, we might as well--"

"You mean my tits, right?"

You hesitate at her bluntness. "Uh..."

She grins. "I hit the nail on the head, didn't I? Your magic trick has something to do with tits. What, can you make em bounce without touchin' them or something? Or maybe you know a way to make my nipples hard with a gesture of the hand.... oh! I can do this..."

Diane arches her back and makes her breasts jiggle with her pectoral muscles-- just a little, drawing your gaze immediately. "It... uh... looks better when I have my top off..."

You clear your throat, trying to keep on topic. "I uh... that's not it exactly, but that's impressive too."

She turns her gaze up to you. "Oh? Then... what is it?"

"I well... can change their size."

She gives you a blank stare.

Maybe you were a little too blunt...

Then all at once her eyes widen. "Really? For fucking real? You can give me bigger tits?"

She says it loud enough to draw the attention of a few people around the corner.

"H-hey... not so loud."

"Oh. Right." Without warning, she grabs you by the hand and leads you to a nearby door, shooing you inside and snapping it shut. The 'room' grows dark and you realize it's a broom closet. Diane flips a switch and a bulb clicks on above you. "There. Now there's no problems."

You feel on the spot, this close and confined, subtlety is out of the question.

"So, what do you need to do to do it?"

You regain your thoughts, somehow, but you can't fight starting at her cleavage. Diane stoops over, alluringly taunting you to show her your magic trick... but you're not sure you should just... tell her. You need to be honest... or come up with an excuse.