Winter was creeping in. Despite all the time Jimmy spent making sure his tribesfolk were happy and healthy, this world was still undergoing the season of autumn.

The grasslands were getting colder, but only by a few degrees compared to summer. The Jurassic Era was hot, it was supposed to be, so most seasons were warm enough to sustain life easily.

Winter itself was violent when it struck, but it was still five weeks away.

Striding across the grasslands was a dinosaur, an Allosaurus Fragilis, with two humans on his back. This dinosaur was Gutaxun, Jimmy's beloved pet, and the first dinosaur he ever tamed.

The humans on his back were Anna and Jimmy. They had a goal in mind today, or a plan, more specifically, which was to visit the underworld.

However, the ride all the way from home, to the part of the river in the grasslands where the passage to the underworld was located, was quite a long one. It took four hours to get there, if Gutaxun was rushed, but from the looks of it, it was going to take them a full five hours, because Jimmy didn't want to overwork his pet.

He had noticed that Gutaxun had lost a couple hundred pounds over the past few weeks, and since there was nothing wrong with him health-wise, Jimmy had to assume that Gutaxun lost weight because he was overworked. He was a loyal companion, but he deserved a break too.

The other reason why he didn't get his pet to rush, was because he and Anna had taken off the few bits of fur clothes that covered their privates.

Jimmy was laid flat on his back, Anna was on top of him, and was moaning her heart out as she rode him.

"Ugh…" She grunted, over and over, like a disgruntled baboon. "You good?"

"Hell yeah…" He smiled, and tried to keep himself from ejaculating.

Anna was enjoying herself quite a bit.

Jimmy's sizable unit did not intimidate her anymore. Over the past few weeks, she has had sex with him perhaps too much, and too often. Her vaginal canal was stretched out as if she had given birth a few weeks ago, and with that said, she had been able to enjoy herself beyond bounds, because she did not feel as pressure from Jimmy's dick anymore.

The ratio of pleasure and pressure was simply perfect for her, and right now, she smacked her ass on his pelvis with the force of three men. She was close to breaking him apart, but since Jimmy did not, and could not complain, she kept her pace going.

"Aaah!" She screamed, as she squirted for the fourth ime in the course of an hour.

At last, she slowed down, and as she panted, she said, "Okay, you can cum now."

"Oh?" He grinned.

Jimmy tried to act like he could last longer, but in reality, all the friction over the past hour had warmed his dick up as if it was a malfunctioning nuclear reactor beam. He was close to melting off, and Anna's pussy simply was too warm, too delicious.

The sweet, strawberry scent of her vaginal fluids have been haunting him for a full hour. He wanted to drink her like a juice box, but held his instincts in tact because he wanted her to enjoy herself to the fullest.

At last, he busted a nut so big that one would think he was trying to grow an oak tree!

"Gaaheeyuuuh!" He grunted, and chirped like a brain-damaged Compy.

A full litre of semen bashed through Anna's sweet pussy. Some of the hot, fruitful semen went past her cervix, but the rest dripped down back on his pelvis.

"My god…" He placed his arm over his eyes, "You're amazing…"

"So are you," She smiled, and leaned over, spreading the load of semen around worse than it already was.

Her warm, small breasts squeezed beyond shape on his chest, and she started kissing him up.

She started out by kissing him on his chin, and worked up to his lips, "Do you think it'll work this time? Everyone else is pregnant… I feel left out."

"Is that why you almost broke me in half?" He chuckled, and got a good grab of her ass. "Don't worry about it. You're pretty healthy, your eggs are ready… pregnancy is just moody sometimes, I suppose?"

"I hope you're right," She said.

Gutaxun kept stomping across the grassfield. The hotspot where the underworld could be entered was still an hour away, so at the very least, Jimmy and Anna had some time to clean themselves up.

Wiping away an entire litre of semen was not an easy job, but they knew that it would happen. They were prepared, and wiped it away with water, and some dried dinosaur skin. The napkin of the Jurassic Era.

Back home, each and every one of Jimmy's other girlfriends were pregnant.

Eni was the first in line, Nechi second, and Mika third. The baby fever hit them before any of his girlfriends even gave birth, but he could only guess that they were excited over the fact that he figured out how to switch his cannon balls for normal semen. They've been riding him bone dry ever since, up until he detected life within their uterus.

Anna was the only one left over. She has been fucking him twice a day for a week now, rushing to get pregnant herself, but either Jimmy could not detect pregnacy yet, or she wasn't getting pregnant. It was hard to tell, and she didn't know if the biology from back on Earth applied here.

Anyway, since Jimmy didn't want to endanger the lives of his pregnant girlfriends, and his future kids, he insisted that they stayed home. They didn't have to visit the underworld.

He wanted Anna to stay home as well, but she insisted on coming with him, so she could squeeze in a few more sessions. She was not scared of funny-looking dinosaurs either, and she was eager to see them.