I'm the Villain Who Captured the Heroine—Should I Make My Move?

Reincarnated as a disposable villain with a death sentence, I'm stuck guarding the weakened heroine in a dungeon while the hero storms in to save her. My boss is already screaming his last—classic cannon fodder fate. But here's the twist: the heroine is right in front of me, helpless and vulnerable. Do I stick to the script and get vaporized by the protagonist, or do I take my shot and rewrite my destiny? The hero's footsteps are getting closer. Time's running out. What's a doomed villain supposed to do?