Ten years later and Kurt moaned out loud as he came deep inside his twentieth daughter, as Twilight had predicted, he had plenty of sons and they were all perfectly normal ponies, though he also had to have sex with all of his daughters and impregnate them as well, he needed to have as many sons as possible to rebuild the male population which meant having sex with as many mares as possible, so when every mare in Ponyville got pregnant he had to move onto his daughters. He asked Twilight how many sons he would have to produce before he could retire from his job of constantly pumping his spunk inside horny mares, not that he wanted to retire. Twilight said that considering mares became fertile ten years after being born, then the chances were he'd have to fuck not just all the mares in town and his daughters, but also his grand-daughters and maybe even his great grand-daughters before the population could safely continue without his help. Not the worst way to spend the next twenty years of his life.

He did consider it rather unfortunate that he could only impregnate ponies, because in a weird twist of fate he had actually gotten into a relationship and fallen in love with Barb the dragon, but Twilight reminded him that Cadence, the princess of love, could make sure Barb beared a child if he was truly in love with her and he wouldn't even need to fuck her. After discussing it with Barb, they both decided that they did indeed want a child that they could raise together, though as expected the child would be a regular dragon rather than a dragon/human hybrid. It was on Kurt's fiftieth birthday, after decades of impregnating mare after mare, daughter after daughter, grand-daughter after grand-daughter, great grand-daughter after great grand-daughter that Twilight confirmed that he had fathered enough sons that would be able to sustain and continue the pony population. Kurt was glad that he had saved their race, so much so that he kept his job as breeder for another ten years before finally retiring to live out the rest of his days with his wife Barb and the twin dragon boys she had given birth to.

The End

Author's Note

Thank you Undead Man for this story idea! I hope you enjoyed it! :)