After getting out of the soul land, Lilith put out a few strange thoughts to Lith and Lucy.
When she was pregnant with Lucy, she could slowly feel life forming as the foetus developed. However, in Lith's case, life was a constant.
"What does that mean?" Lith and Lucy both didn't understand and asked.
They were sitting on the couches in the lounge area and discussing these matters.
Lilith had a frown on her face and explained to Lith, "When you were developing, from the initial stages till birth, your soul was a constant. But in Lucy's case, her soul developed along with her body. I can guess that she's a brand new soul, but even if she wasn't, this would've been the normal process."
The process of birth was a complicated one. How souls formed was a mystery and not in control of anybody.