Madison's soul-crushing desperation made you feel pretty bad about yourself. The moment you realized the sapphire's powers, you thought you'd become an evil bastard and love every minute of it, but you're just not as sadistic as you always thought you could be.
"Alright. You win." You say.
Madison's bawling dies down. She looks up at you.
"I'll reverse everything, and leave you and your family alone." You say.
She lights up, and leaps to her feet. Her leaping, though, is a bit hampered by the mess in her diaper.
"Thank you! Thank you thank you thank you!" She hugs you and jumps.
"Heheh, don't thank me. I'm sorry for inflicting all of this on you in the first place." You say, slowly pulling her away from you, standing up and cracking your knuckles.
"Wait!" She says. "Are you just gonna leave?"
"Yeah, I'm gonna undo every command I gave you and your family, erase your memories of me, and leave."
"Okay...well, I kinda enjoyed having you over." She says, putting her hands behind her. "I know that's just because you MADE me, but still..."
"Look Maddie, I best not stick around. You're too adorable as it is, and when you're in a diaper you're just a knockout of cuteness. If I saw you, I'd just want to put you in a diaper all over again."
"Ewww..." She looks behind herself, getting thoroughly disgusted by the mess as it continues to permeate the room. "You're a really weird person. You should hypnotize *yourself* into being normal!"
You consider that. Is hypnotizing yourself possible? If it is, you'd have to be very careful.
"Well anyway Maddie, thanks for giving me some great adorable entertainment. Goodbye!" You take a breath to begin your commands.
"Wait!!!" She yells, running up and pushing your belly. "Why are you going to erase my memories??? That's scary!"
"You don't want to remember this really gross and scary evening, do you?"
"I dunno...I want to keep all of my memories, good ones AND not-so-good ones. And wait! If you just leave and make me forget everything, I'll just be standing here in... THIS thing!" She pats her bottom. "And I'll have a bunch of them in my dresser, and I won't know why, and I'll be freaked out FOREVER!"
"Oh, good point." You chuckle.
You pace the room a few times, contemplating what to do. Meanwhile, Madison is getting *really* antsy about the mess she's standing in.
"Alright," you look over at her, "I've made my decision!"