I have a few sketches for sequels to this, if I end up drawing them then they'll be canon in her story. Up until now her adventures have had her breasts grow massive, then gave her control over what her body looks like, so the next piece of her canon will have to bring about even greater changes. I enjoy stories that escalate both the personal danger a character goes through, and the reward at the end for overcoming it. With massive breasts she had to deal with intense arousal and nearly uncontrollable desires. This time around she's a victim in a breeding facility, and the rewards are... physically indistinguishable from what she gets if she fails. As before, success means she gets control over whatever she gets, failure means leaving that control up to whatever else did this to her, for as long as she lives.
Most fetishes don't bother me too much, most of my interest is in the hero gaining or losing control over whatever happens. In the fandom most categories of fetish fall into controlling or loss of control, and then stay there, so Amanda is a fun way of taking something meant to be out of control and giving her control of it. So, spoilers there, she usually ends up in control at the end.
The reverse would be interesting, a fetish that normally features control over others, and inverting it so the character has no say in the matter. Like a mad scientist that doesn't want to create freaks of nature that are bent to their will but it just keeps happening anyways.