I Guess I Became the Mother of the Great Demon King's 10 Children in Another World, Volume 3 (I Guess I Became the Mother of the Great Demon King's 10 Children in Another World #9-12)

Akari was a typical game-loving 16-year-old girl who lived with her mother, until a fateful accident left her an orphan. A year later, she makes a fateful wish on a game disc to be a great mother for a family of her own - only to be swept through a portal into another world! She finds she's been summoned as the "priestess from another world"... whose role is to become mother to the children of the demon king himself?! After she quaffs a stork tincture, a cheat potion that causes anyone who drinks it to become pregnant in an instant, she gives birth to An, King Gran's firstborn daughter.

Just as An, King Gran and Akari are beginning to feel like a family, Akari and her daughter are whisked away by the Hero Albert, the airheaded, gallant sworn enemy of demonkind. He means to win them over to his side, but Akari chooses to return to King Gran... and gives birth to Deux, An's baby brother! It doesn't take long for Deux's gifts to manifest. He teams up with his sister to solve food shortages at the Zodia Empire... just as they take Albert prisoner! Things are livelier than ever around King Gran's castle, but on the other end of the world, the captive Queen Dernière burns with rage in the clutches of the humans...