I don't think you need to rewrite it because its really good so far. When will giantesses show up?

I remember this story, it was quite good.  Very good in fact.

I'm not sure what you want to change about it; though I can relate to you wanting to refine a story, especially one without a complete story line.

If I may make a suggestion, before you write your story, either at the top or bottom of the page make a story outline (i.e. if you are using Microsoft Word, use the first or last page to write out a story outline and character descriptions, and the center section to write out your actual story).  You can then refer back to this outline as you continue to write your story, even editing your outline to incorporate new or remove old content as your story progresses.

An important part of writing out your story plot is identifying your overall and specific objectives.  An overall objective would be along the lines of a boy, Adam, seeking control and ownership by a giantess, Cindy.  A specific objective would be Cindy shrinking Brody's dad (if I recall correctly from your previous posting) and doing away with him.  You can always go back and change your specific objectives; but be careful of changing your overall objectives if you wish to keep continuity.

Can't wait to read anew, or even read the next version of this great story.