During "A Sitch in Time", Shego discovers the real reason an older Kim does not exist in The Supreme One's world, and it results in a paradimn shift for Hero and Villian. [I do not own anything.]

All lies have a way of eventually turning against you. After years of lying to others and especially herself, Kim is learning this lesson the hard way. That is, until a mysterious diary she finds in a parking lot becomes the key to saving both herself AND the world. A world full of old enemies, new friends, moral crises, superpowers, and life at its most powerful. Post Grad. Kigo.

The end of days, the end of everything that had happened... She wouldn't have to lose the two things most precious to her.