Fall In Love With Substitute

What he needed was a puppet that could be used as a substitute for his beloved woman. What she needed was a backer that she could rely on.

He was domineering, arrogant, a devil, a king of both righteousness and evil.

She was stubborn, proud, and beautiful, a seductive spirit.

As the double became more and more important, as the facts began to distort, how would they develop? Is it mutual benefit? Was it a battle of mutual hatred? Or was it a fake act, with love as an exit, to escape the labyrinth of hatred?