Pretty good story so far. I  hope we can get some of the PoV from the other characters, especially Hannah. Hannah seems to be near-obsessed with her brother, and it would interesting to further explore that. She almost reminds me of a yandere (idk if ur familiar with the term, but basically it means crazy obsessive girl; maybe that can give you some inspiration).

I also think it might be interesting to have the girls that are growing taller start to have a thing for shorter boys due to the power they feel over them. Who knows, maybe some of them can try and romantically go after our protagonist. Or maybe have Sam reenter the story and start to view our protagonist as cute.

I’m just throwing our ideas here, but whichever direction you go, I’m sure it’ll be good. Keep up the good work.

First, I'm really liking this story!   Big fan of giantess little siscest.  

As far as the story goes, SPOILERS

I'm glad Hannah is expressing sexual interest in him/enjoying soft domning him. From how you've written it, the dummy has realized she kinda fucked him for life with her little hypnosis thing. My hope is she started teasing him out of pity/because it was funny and it's evolved into her actually having some feelings toward him.  That's me.  

I'll be the bad person and say I don't want Sam and Nate to reconcile.  I like that downer moment, hopefully with him getting some good closure. I think you did a good job with Kerry, with hopefully a followup on what you put at the end of her section.

That's what I'd recommend, at least.  You seemed to imply Kerry was done etc.  But if I may, I think that and where I think it may be going might be a mistake?  Or at least less ambitious?  Kerry basically being ruined for other men by having experienced her fetish with Nate is awesome, as is her having to basically learn to be nice in order to get with him.  It'd even be funny for a bigger Hannah to disapprove of her cause she's not good enough for Nate.

Nice story! I like how it is progressing

Personally, I hope that the pacing of the story will increase some more so we can read more about characters growing over the years while Nate stays the same. 

I really like Hannah and I want her to grow even faster! 
Like, maybe Hannah starts growing like crazy once she hits puberty, so her parents send her to a special clinic for about a year to be studied. However, the doctors do not find any abnormalities and once she comes home Nate is shocked to find that his sister has become the tallest in the family at over 7 feet tall!

Great story so far, hope you'll continue it!

I read all three chapters on your AO3. And man, I really like your story! Chapter 2 is my absolute favorite right now, and that ending still give me shivers. This first attempt of yours is incredible in my opinion! Don't lose ispiration 'cause this is really intriguing. The couple Hannah and Jess are my favorites hands down. Please keep it up! It's been awhile since i read something like this, and i missed it so much!