After considering things for a little while, Ty's desire to see and hold her baby was growing. She knew it'd be so beautiful, and a part of her really wanted to give birth. She knew it was meant to be painful and weird, and she didn't care, she knew it was something she needed to experience.
She lay back on her bed, looking at herself in the mirror, and wished she would age to childbirth and have a complication-free birth, as well as that her family wouldn't interrupt her during all this. Her stomach grew further until her navel protruded from its fullness, she felt her breasts grow subtly more pert and full of milk, and at last she gasped as she felt the first contraction in her vaginal muscles.
She clung to her bedsheets, breathed in and yelled out as she pushed. Slowly she established a rhythm- cling, breathe, push. Cling, breathe, push. While it felt pretty unpleasant, Ty was able to keep going without too much discomfort. Soon her nether lips had widened enough that she could see the head. That relieved her- she was almost there, soon she'd have her child! With more groans and screams, Ty's body continued to stretch, and she felt a near-orgasmic relief as finally the contractions subsided.
Ty's cries were replaced with the cries of the baby that had just emerged from her, and she slowly sat upright and felt like she could cry with happiness at seeing it. Shortly after, a placenta followed the baby out of her. She laughed a little at seeing what a mess she'd made of her bedsheets, and noticed the umbilical cord still connecting the baby to her. She wished into existence a pair of surgical scissors and cut it, before cradling the baby in her arms.
Now she could properly see her baby. To her relief, it looked healthy and was slowly crying a little less as it looked at its mother. Its skin was a darker tone than Ty's, reflecting Eileen's paternity, and it had an adorable dimply smile and a fairly normal amount of weight for a newborn. Judging from the penis between its legs, it was probably a boy.
The baby gurgled and reached up at Ty's chest, at which point she remembered she probably ought to feed it. She positioned her baby, and felt him suck milk at her breasts eagerly. Ty felt a strange sort of pleasure now- she hadn't just become a girl, or a woman, but a mother. What she had just done with her body confirmed it, and even if she knew Eileen probably wouldn't approve, Ty still felt very proud of herself.
Ty wondered what to wish for next as she looked at her newborn son...