It's all about the Erza.

Erza as a kid.

Erza was baking cake, with her mom. "Mother, I just love cake." She told her.
"Me too, I think you get it from my side." Her mother chuckled.
They stirred it up, until it got smooth, and real creamy. "Wow. This is fun!" Erza smiled.
"Now, time to put it in the oven. While it cooks, Erza... Do not touch anything. But you may lick that bowl." Mrs. Scarlet said, while putting the cake into the oven.
Erza nodded, and scarfed down the bowl. "Wow, this is going to be the best cake ever!" But, then Gray and Natsu sneaked into the room. The timer went off, but none of the family heard. "Shall we give them a favor?" Gray asked.
"Maybe more than a favor... I am starving, and this smell is making me even more hungry." So they took it out of the oven.
Soon, they were lying on there bellies. "How good was that?" Gray asked.
"Sooo good..."
Erza walked into the kitchen and saw them on the ground. "WHAT!!!!" Erza chased them.
Gray and Natsu ran. "he ate the cake!" They blamed.
Erza jumped onto Gray. She pulled his head backwards. "HEY!" Gray cried.
She smacked him, too.