Why Helena made the egg hatch on time was because she couldn't be carrying an egg about in this dangerous place. Or it would break which would be a total waste of her effort.
With a smile in her face despite the splitting headache that she felt upon using all her Aetha energy, she rubbed the feathers of the bird and then kissed it head.
"Look at you, so beautiful" She said.
Then not wanting to waste further time in this place since the beasts that dwelled here could return, she held the small bird in her hands and tried to inhale to gather energy Aetha energy within her to some amount.
After she felt that she had raised her Aetha energy level to a degree, she quickly stood from where she sat and dashed out of the cave.
With the bird in her hand, she ran at the highest speed that she could muster. And as she ran, she tried inhaling too at the same time to continue gathering Aetha energy within her.