The man comes back from the kitchen.
He calls the stepmother and stepsisters appart. "Now, listen, don't get too enthusiastic. We do not want to hurt her. She is the Heir, and nothing bad must happen to her, remember?. Our goal is to make her morbidly obese. Our goal, your goal, is to make her weight reach, if possible, over 1000 lbs, but in a gentle way. You need to keep this goal in mind.
I turned a very thin girl into a circus Fat Lady, and this is what we are going to do here.
The goal is not to cram food crazily in her mouth so that it hurts her and make her cry. No.
The goal is for you, the stepmother, to be in total control of her and her money, and eliminate any possibility of rebellion from her against you.
When we are done here, Cinderella will be too fat to leave that bed. She'll have a massive, huge belly that will prevent all her movements. Her arms will be so massive that she will be able to move mostly her forearms, and with great effort.
Then you'll be in control. You'll sit by her side (as close as the belly allows it), to feed her at will. You'll be able to show her pics of the times when she was thin, and tell her about the things you do, like shopping, dancing, running, walking, that she won't be able too.
But, to get to that point, you'll have to be both patient and thorough.
She must be forced to eat a bit more everyday, but not more than that bit. Sleep and eat. Sleep and eat. So that she won't burn any calories, and her stomach will get bigger, little by little, everyday. So that everyday it'll take a bit more of food to fill it. This will have to be made firmly but gently.
We will calculate how much food she'll have to consume everyday. So that we do not hurt her. But it will not be tolerated that she refuses to eat what was alloted for the day.
Some days this will be funny, and some days this will be boring. But this is the way it has to be done.
The first months are boring. From rail thin to obese. She will be in denial about her fate. The'll be lots of sobbing and begging. She'll began to miss her days of hard work around the house. She'll talk to each of you individually so that you feel pitty for her and let her go. He will promise to give the whole inheritance to one of you, to put one against the other.
At a certain weight, when we are sure she cannot hurt us or escape, let's say at 670 lbs, we can take the cuffs of, and allow her short walks around the room, assisted by us and a cane. It'll get more difficult to her everyday. Even though she we'll be ansiously expecting the moment of "the walk" the whole day, it'll arrive a day when, after much effort and even with assitance, she'll have to admit she cannot do it, and when she'll have to choose to remain in bed. You, the stepmother, will have to be very clear that the day she decides she cannot take the walk, she will not be allowed another one. It'll be the last one in her life. She'll fight to prolong her chance to walk to the last. I've seen it with my Fat Lady. But as you'll keep feeding her more day after day, and her belly will keep getting bigger and heavier, there will inexorably be a day when she herself, will have to admit she cannot get up from bed.
So, having said this, let's get to work".