"The Master's Way" and "Stranger than Fiction" both feature giant, dominant women.
The latter actually features several tiny, waifish girls growing to amazonic stature:
- a formerly bullying girl has her stature reduced (leaving her so extremely puny that even her un-transformed former victims are easily able to push her around as a petite-but-tough girl who challenged her grows into to a muscular, busty amazon, a head taller than anyone else standing nearby.
- football players used to having their own way are suddenly intimidated when a female jock is 'enhanced' to about seven powerful feet tall
- the cute little Asian chick who is president of the local anime club becomes a staggeringly busty mini-giantess, as does the protagonist's girlfriend
http://growthcomics.com/content/the-masters-wayhttp://growthcomics.com/content/giant-breasted-giantessesThe focus in Stranger than Fiction is more on height and boobs yielding dominance rather than on muscles, but there is a little bit of muscle growth on display.