Futanari Supergirls: Galaxy Girl and Stormwing - Futanari Supergirls, #2

It's been a week since Shaylene Tate's body changed, and she and her best friend Nikki Jones are no closer to figuring why she grew male anatomy, or understanding the source of her mysterious new powers. They've essentially gone into hiding, avoiding other people until they can learn more about Shay's new body and abilities, so she doesn't end up being experimented on in a government lab somewhere.
In this episode, they discover an important piece of the puzzle, that only ends up creating more questions than it answers... This 8, 250-word story is part two in a series. Each will be available separately, and as five-part anthologies once each sets of five is complete. In general the series will feature futa-on-futa, futa-on-girl, futa-on-man, and gender swap elements. This one features futa-on-girl.
This story depicts adult characters consensually engaging in explicit sexual situations. None of them are related, either by marriage or blood relation.