Double-checking the marks on the egg with what she had found in the book, Elise came to the conclusion that the boy she had gotten inside was going to be hatching into something quite fitting; a fairly.
Also, as fairies are mostly female, he would have a gender swap.
Elise couldn't wait to see his change. Fortunately for her, the egg was about to hatch. As soon as she predicted what would happen to Edwin, the egg started to crack and magical light came ot from it. Then, a naked girl fairy was standing where the egg was.
Edwin, the girl fairy opened "her" eyes and looked up Elise, and said,
"What happened? Why you are so big?"
"I'm same as always, but you are not. You are now about 5 inches tall."
"What? Wait, why my voice sounds so high?"
Edwin looked herself down, and she was greatly shocked. She spotted small breasts on her chest, and the missing of her penis.
"A - Am I girl??!!"
Edwin yelled, but Elise told her more shocking news.
"Look at your back, little girl. You're a fairly now!"
Just like Elise said, Edwin could see wings on her back. And she was surprised at the change of her body and thought about what would happen.