It was 10,000 years ago, a family of anthro saber tooth tigers was roaming the frozen plains looking for food. The oldest was an 18 year old mother, barely covering her furry body with a deer pelt over her hips. Latched onto her chest was a newborn baby sabretooth cub…her youngest. Her oldest was a nude 6yo with boobs that were almost as tall as she was. Not paying attention to their situation, the 6yo sabretooth loli was gazing at the clouds. The middle child was 4yo with a big phat ass. No seriously it was so big that she couldn’t walk upright and had to amble around on all fours like her full sabretooth cousins. Trying to sneak up on some mammoths to spear them for dinner.
When the mother turned to call her 4yo back in because the clapping of her ass cheeks was enough to announce her presence to the mammoths from up to 5 miles away, she lost track of her sabretooth baby boy. When she had finally corralled her daughters and went looking for her son she found him in the middle of a field almost a half mile away in the center of a mammoth herd. Before she or any of his sisters could do anything, he jumped on top of the rump of the largest female mammoth and inserted his cock into her pussy. Trumpeting her trunk scared off all the other mammoths as her nether regions were raped by a young sabretooth tiger cub. Slowly his penis grew inside his mount more and more, getting to the size of a large mammoth’s dick quickly, and even bigger. Mother and sisters could see the bloating in the mammoths belly as he pumped more and more of his sabretooth spunk into his prey. At the mammoth was cumflated to the point that her legs were lifted off the ground by her gravid belly it started to creak and groan. Before long the pressure became too great for the female mammoth’s insides and her belly burst with a torrent of shota spunk splashing around the now dead animal. 
Arriving at the scene of the deceased mammoth, the sabretooth mother found her baby boy was still hard as a rock. His 6 foot cock throbbed and pulsated with heat in her hands. “Mommy can take care of you now.” She cooed, placing him at the entrance to her pussy. “Are you sure, mommy?” the little sabretooth asked. “Of course dear, if that was a load of cum, mommy can take that easily.” Pushing her pussy back and taking all of her hyper son’s dick inside her womb with one thrust. “Not cum, mommy, precum.” He protested. “Baby, no! If that was precum, then I can’t take your cum…pull out now!” but the little boy couldn’t, his massive meat was already expanding bigger inside his own mother’s cunt, making it impossible to pull out. His 18yo sabretooth mother had a valiant effort, her womb expanding like crazy as he started to orgasm. Her waist was larger than the diameter of the heard of mammoths earlier. But it was too much for even her and when the pressure inside her belly got to the breaking point, she did. Her burst was a little more violent than the mammoth’s as she had more of baby’s cum inside her. The explosion of cum that came out of her gut rained down in the valley and the baby sabretooth tiger was left alone with his sisters.
With gusto, his 6yo sister with her huge round sabretooth tiger tits jumped on his cock. “Time to get some baby brother” she cooed. Enjoying himself as his older sister was impaled balls deep on his now 8 foot long shota cock he relaxed a bit, letting his cock swell inside her more. “Oooooo, that feels soo good baby! You must be at least 12 feet long inside me now. I can’t wait to take your load, if that is all you could give mommy, I can take it.” The baby boy’s eyes shot open “Not a full load, just one shot.” He informed his busty sister. Panic rose on her face “No, nonononono, that can’t be. I can take what mom did, but if you cum multiple shot’s I’m going to burst! Pull out now!” Try as he might, his thick knotted member was too big, thick, and deep inside his eldest sisters snatch to pull out or abate the incoming flood of cum into her pussy. As each shot rammed down his urethra and bloated her belly the lining of her womb became thinner and thinner. Her gravid gut lifting them both higher and higher as her newborn baby brother kept pumping more and more hot sabretooth jizz into her womb until. *Pop!* Her body couldn’t take any more and burst. Nearly as big as a mountain by the time she exploded left the valley full of shota cum, rivers of hot semen flowed out of the valley and into other parts of the world. The hyper hung shota sabretoothed newborn was flung onto the peak of a nearby mountain.
Finally, his 4 year old phat assed sister caught up to him. Her boulder sized ass cheeks clapping together as she climbed the mountain to him, audible from 8 miles away. She slowly pushed his now 20 foot newborn manly baby dick inside her pussy. It was so much tighter than the mammoth’s pussy, his mother’s cunt, or even his 6yo sisters vagina. “Stop sis, please, I’m going to pop you too.” He pleaded, but she just started to ride him up and down. “Shhhh, don’t worry. I can take it, I can take all of your loads.” She reassured him. Feeling like this sex was not going to end his sister’s tight body, he let loose. His cock growing to 80 feet long, his knot bloating up to over 60 feet wide, he started to cum. Each shot was filling her more and more. Pools of cum inside her turned to lakes, then oceans. Load after load pumped out of the baby sabretooth’s massive kiddie dick into his loli sabretooth sister’s petite body. Shot after shot led to load after load as his orgasms started to string together in the tight hot hole his 4yo sister gave to him. Her womb bloated larger and larger, filling the valley, then stretching across the land, larger than the moon, then starting to surpass the whole earth in size. Their love was cataclysmic.