Kristen sighs, then nods. "ALL RIGHT. BUT NO TRICKS. IF YOU DO ANYTHING OTHER THAN GROW US BOTH BACK...."
"Don't worry," you say, as she lowers you to the ground.
You stare up at her, and first turn the gun on yourself, setting it to make you full-sized. Pulling the trigger, your return to normal, and look down at the tiny Kristen at your feet.
You adjust the settings on the gun to bring her back to normal as well; as you take aim, though, you wonder; you have the upper hand now. And how. You could do all sorts of things to Kristen...or, at the very least, shrink her down further, keeping her from getting you into trouble.
Yes, that is tempting. But is that really what it's come to? You did give her your word, after all.