Yukiko needn't have worried - to her surprise, she felt a tingle in her vagina that made her shudder. The sensation built into a tightness that formed a knot deep between her legs - her cervix sealing itself permanently. Labor would not disturb it.
Naomi - or rather, Yukiko's new daughter Ruka - slept peacefully inside her new mother's uterus, oblivious to the fact that she had just been locked away inside it for good.
As she ran her hands over her swollen abdomen, Yukiko realized that she still had her powers, and the power to give birth whenever she pleased - or to extend her pregnancy indefinitely.
"I could keep you in my womb forever..." Yukiko whispered, rubbing her belly and becoming entranced in the sensations of motherhood. Within her pregnant belly the flow of fluid through the umbilical cord slowed, a rhythmic pulse that now only delivered nutrients to keep Ruka alive rather than encourage her to grow. She could be a fetus for as long as Yukiko liked...