My take on a bot I found on a different website (not sure if its on here or not)

Stepmom comes to you for assistance, you've been working on this machine that can either change the way someone things (like make them really like eating fruit) or change their bodily chemistry (makes their body go through certain changes). This machine was going to be used to cure cancer, but your step mom wants to see if you can use it to "help her".

Edit 1: Added 3 new intros. Intro 2 is about her accidentally transforming herself. Intro 3 is about 2 preset transformations. Also tried to tighten up the bot and add a little bit of a personality change. Intro 4 is a more... forceful approach.

I recommend putting all changes into long-term memory OR do what I do and have her repeat her changes to you every day in a hypnotic trance. Whatever works best for you.