"Molly, dear sister, I thank you for unleashing me into this world... this wretched world.... it's been long overdue. You were right to transform that very naughty boy of yours. He was weak. Useless. Pitiful" the new Mia said, in a seductive and sensual way that both was and wasn't intentional.
Molly was a tad confused by this. This was certainly not the first thing she expected to hear out of her new sister's mouth.
"What, did you expect me to forget that I was ever a stupid boy such as Miles? I'm too smart, too powerful for that, Molly. See, I've always been lurking in your heart. Truth is, I'm your... deepest desires come to life. I'm your dreams come true, Molly. I'm Mia, your precious sister... and one of the most powerful beings on the planet" Mia said, a slight laugh right out of an evil villain playbook escaping her mouth.
Molly remained silent for the moment. For the first time in a long time, she had a twinge of regret.
"Aww, are you having second thoughts, sister? Don't worry, my dear Molly. This was fate, this was destiny. Trouble the Keepers of History if you must. I bound to come out, one way or another. I was bound to exist by your hand. This was what you always wanted, and my older sister always gets what she wishes! Molly, I truly can't thank you enough for this. You give me life! You give me a soul! You give me... everything." Mia continued.
There was something quite strange about all this to Molly, something unreal. She had thought about all the different ways this could go, all the different pathways, the roads she and Miles could have travelled. But never in a million years could she have imagined this.
"And now that you've given me everything... I plan to pay it forward. Pay it all back. This world is putrid, broken, in desperate need of duct tape to patch things up. I am that duct tape. I am that fix. Now that you have finally given me what I need, I am hear to save this world, remake it in my image, and finally bring true peace to this idiotic race. And there's one place I need to start..."
Option 1: Mia challenges Molly to a Magic Duel to become the new Head of the Family, gaining the final bit of power she would need to take over. Molly, stuck in a bind, accepts the duel.
Option 2: Mia share with Molly her plan to take over the United States. Molly, actually intrigued, decides to go along with Mia's plan, in hopes to not invoke her wrath.