Can de Vega die?

In the game code somewhere it says that de Vega could die. Is there any way to do this? How can you do it?
How do you make it so de Vega doesn’t report you to the king (when you try a coup d’etat with de Mendosa) if you supported de Mendosa’s death rods?

You can’t, he’ll die in the fighting. FYI de Mendosa and de Vega are mutually exclusive to each other, so if your planning a coup… Don’t tell the other one.

I personally fell in love with de Vega. I thought it was romantic and the whole taboo of dating your Monarch spouse’s advisor was very swoon worthy. After I poisoned the King and became Lord Regent I proposed to de Vega. Sigh, my one true love! <3