From the onset of your womanhood, you were taught that the weakness of many men is their sexual desire. You were warned that many men would wish to use your body to pleasure themselves, with little regard for your own feelings. However, you came to the realisation that you enjoy sex a lot too, and decided to use this to your advantage. As the heir to the throne, you had used those around you to develop impeccable technique at seduction, formulating a plan for as soon as you came to the throne.
Once you did, you enacted that plan- courting the King of your hostile neighbour. As you had guessed, he proved to have an insatiable libido, which you willingly helped him to satiate. And while he slept having fucked you, you slit his throat. The Kingdom was stricken with grief, and you led an invasion of it which brought it under your control.
Another kingdom allied with the first sought revenge for your conquest, and this time you took a different track. You led your forces into a vicious battle, and engaged the most seasoned commander of their military in combat. After he managed to defeat you- or so he thought- he felt entitled to attempt to sexually conquer you. You played along, acting terrified and pained by him while in truth actually rather enjoying his cock, until a soldier of your forces (as you had forewarned them to do) found you both and cut the creep's manhood from him. The scream of shock, pain and humiliation he let out is something you'll remember forever, and after his castration the commander was slain, allowing your army to proceed to another conquest.
Yet another war broke out a number of years later, and in negotiations to end it as it reached a stalemate, you once more came to court your enemy. This time, however, it proceeded much further- you earned his trust, and made love to him many times, playing along with his fantasies, even following through on a marriage that everyone believed marked peace between your peoples. But none of your people really desired to make peace with his, and so it was that as you made love on your wedding night, you found a knife which you had hidden in the bed, and as he reached the peak of his pleasure you cut his head from his shoulders, his body's last act being to ejaculate inside you. Leaderless, his country was crushed by your own.
There was, however, a twist that followed all this...