The delivery went smoothly and quickly. Just like the previous two. Jake's custom-built vagina and uterus were designed to withstand severe stress, the sort that would tear a cis woman or traditional post-op trans woman. Dr. Thomson was pleased, particularly that the quadruplets were identical. The odds of the multiple identicals in a row were low, and she wondered if it might have something to do with how Jake became capable of being pregnant.
"I'm ready to go again, doc," Jake said, a few hours after giving birth. Amber looked at Dr. Thomson, who shrugged.
"The treatment that made him capable of pregnancy was designed to make his pregnancies easier. Like the birth, for example. Remember, the intended goal with the treatment is to make it so communities with few women can still have children."
Some places in China, for example, had barely any women, and their population would soon suffer. Dr. Thomson couldn't wait to roll out her work to those communities in need. But she had to be patient and continue her studies first. Jake was just once success. She needed more.
"So you're saying she can knock me up again?" Jake asked. Dr. Thomson nodded. "Do it, Amber."
"We're going to need a nanny at this point," Amber said.
"The study will pay," Dr. Thomson said. She stood back, ready to observe. Amber pulled down her mini skirt, freeing her virile cock. Then she climbed onto the bed and plunged into Jake. Jake gasped.
"Yes, yes!" he moaned. "Fill me up, baby! I need to be barefoot and pregnant!"
"I'm doing my best," Amber grunted. After about half an hour of action, she came inside Jake.
"Thanks, babe," Jake said sleepily. "Do it again later to make sure."
"Always, baby. You know how much I love you big and pregnant." She kissed Jake and slid off him. Jake began to snore.
"Good work," Dr. Thomson said to Amber as she pulled her skirt back up. "Are you ready to do it again?"
"I was thinking that getting Jake pregnant again would be enough for my paycheck," Amber said, surprised.
"It is. But I've still got two men ready for your sperm, so if you're willing, you could get them pregnant, too. I'll pay you extra for each one," Dr. Thomson promised. Amber sighed. They did need the money...
"All right, take me to them," she said.
After the two left the room, the side table by Jake's bed was missing a phone. Instead, it was in the hands of...