Once upon a time, before the guns, the bombs, and the electricity, there lived two sisters, twins that were destined to be queens of the land they inhabited, but their mother fell pregnant again before it was their turn, both twins, adults at this point, reasoned that if the baby in their mother's belly turned out to be a boy, their destiny would be ruined...

So... they organized a plan...

They got a potion from a wise woman, on the pretense that one of them was pregnant and didn't desire the child, then, the two wicked women feed the woman the brew with some tea...

...

Both the twins were caught in the act by the king's physician, when their father heard of what they had done, he sent them to a tower... there to stay until they starved... oh, but what a misfortune, the drink worked, and the queen miscarried...

...Now the kingdom had no heirs... no hope... and when the kings both died, everything fell to ruin under riots.

(https://www.youtube.com/watch?v=ajM4vYCZMZk)