Here's my updated walk-through mod for chapter 2. It's a modified script. I made most of the positive choices green.
I left Amelie as the aunt because it makes more sense. Making her the mom would involve rewriting a lot of dialog and I'm sure the developers didn't intend this to be a M/S game.
To install: Save to your device and replace the script.rpy file in the \game folder with the new file.
Just for fun I've included a patch that changes "Aunt", "Uncle", "Nephew", "Cousin" to Mom, Dad, Son, Sister etc.
To install Download z_patch.rpy and copy to the \game directory.
This change will lead to some quirky dialog. If you point out the quirky dialog, I will try to fix it.
For ecample, I found a couple of spots where the MC refers to "Dad Davie".
Enjoy.