As Jeff laid there, rubbing his new clit, his girlfriend's cum filled his womb. A few weeks after this, Jeff decided to try using a pregnancy test. To his surprise, he was pregnant. He was shocked; he never thought he would be the one to get pregnant. He told Sarah, who was overjoyed; she couldn't wait to be a mother.
Jeff decided to keep the baby, as the idea of being a parent grew on him. He and Sarah moved in together a month later, having sex nearly every day. Over the months, Jeff's belly grew, becoming big enough to block his view of his feet. That wasn't the only thing that grew however, as Jeff's new hormones caused him to sprout a pair of medium-sized breasts. As he thought about breastfeeding his new baby, he realized that it would not be inaccurate to call himself a mother, rather than Sarah.
This was the life Jeff was always meant to lead, he thought. Not impregnating women, but getting impregnated himself. Jeff started to stay at home, leaving Sarah to provide for her pregnant boyfriend. Every day, when Sarah got home, Jeff sucked her dick, which he had become quite skilled at.
Sarah moaned, feeling Jeff's tongue sliding along the bottom of her cock. Jeff rubbed his pussy as he sucked Sarah's dick; he loved being her cocksucker. After a few minutes, Sarah's dick spasmed, and Jeff took this as his cue to take her cock all the way to the base, letting Sarah cum straight down his throat. He had become used to the feeling of his girlfriend's cock in him; he could barely remember fucking her with his own cock.
One day, on a cold November evening, Jeff began to feel an intense pain in his loins. It was the moment he had been waiting for for nine months now; he was going into labor. Sarah drove him to the hospital as Jeff took deep breaths in the passenger seat. After a few hours, they were given a beautiful baby girl, who they named 'Lara.'
As Lara grew up, it became clear that she was not a girl at all; she was a cuntboy, just like Jeff. She began going by the name 'Luke', which her, now his, parents supported. Going through puberty, he never grew breasts, but he did still begin having periods. Luke became quite popular in school, and the fact about his genitals was only known by a few of his friends.
Jeff had long since forgotten what having a cock felt like. Sometimes, he felt curious, but remembering how much he loved Sarah's cock, the thoughts quickly subsided. They lost the Chronivac a long time ago while moving, so regardless, they could not change their bodies back to how they were; not that they wanted to, of course.
Luke, now 18 years old, was exploring his parents' attic one day, when he found a strange device in a box hidden in the corner of the room. He wiped the dust off it; it was labelled 'Chronivac 4.0.' Luke decided to plug it into his laptop and give it a try.