Mark awoke in the middle of the night looking directly at the ceiling. When he came to his senses, he tried to move around but found difficulty in being wrapped in a blanket. His baby body was still a bit weak and lacked energy. At this point, Mark was starting to have second thoughts about this infant thing, leading him to make another wish.
"I wish I was 21 years old." As soon as he spoke those words, his body began its transformation. He lost his baby fat and his face smoothed out, becoming thin all around. His limbs and torso started growing out, becoming more mature, with the diaper barely stretching and the blanket covering his waist reaching the floor. His tuft of hair became a curly ball as it stretched out. At the moment, he had the body of a 10 year old boy.
As his body continued to change, he still had some lingering thoughts about being a baby. Although he won't miss his old form, he will miss the sensation of weaning from his mother's massive tits. This affected his transformation however as he felt pain that he's never experienced before. Mark's skin became more lighter along with his bones shrinking and rearranging themselves to give his body a more feminine shape and appearance. He put his hands together and noticed they were more delicate and thin. It wasn't before long that his legs underwent similar changes, with his thighs becoming curvaceous and thick, sensitive to the touch from Mark's new hands. He went through immense pains as his groin begins to change, with his testicles retracting from his body to become ovaries and his penis shrinking inside itself to form Mark's vagina. His nipples began to bud and expand slowly from his chest while his behind began to fill out and become more plump. Underneath the blanket, Mark's diaper was close to reaching its limits as it acted as a thong that covered his genetalia and emphasized how large his new firm ass is. Mark's face began to shift to take on the new appearance of a woman, with his curly hair growing out and reaching towards his back.
By the time the transformation was finished, Mark was standing in his crib and began to look around the room. Nothing had changed aside from his newly acquired assets as he shifted from being a baby boy to becoming a well-endowed woman. He now she got out of her crib by simply stepping out of it and started examining her new body. She moaned as her hands cupped one of her giant breasts and tweaked her nipples. Much to her surprise, she noticed that they leaked a strange white liquid. It seems her transformation also made her breasts lactate milk. She then removed the blanket around her and began to feel up and down her legs, realizing how sensitive her new body is. Simply touching them sent a strong sensation that made it almost impossible not to be aroused by. She also noticed another strange liquid run down her thighs. It seems that her body still remains incontinent and at some point ended up urinating in her diaper. As she began pushing around her soggy diaper, it became enjoyable to feel the moist plastic cloth being pushed against some of her private parts. She eventually sat on the floor and began rubbing her clitoris gently. Mark was so absorbed in her new body that she failed to notice her wife turning on the lights in the room and discovering her new form. Panicked in the moment, Mark uttered another wish during the situation.