Nothing (Cross-Gendered Challenge)

I looked down from the balcony, overlooking my rising creation. Dispite early setbacks, it was almost finished, to my great satisfaction.
“Well, my dear sister,” I drawled, strolling back inside the cavernous room, “looks like my ‘crazy plan’ will continue after all.”
“You’re mad!” she cried. “You’re absolutely horrible!”
“Oh come now, you’re only saying that.” A thin sneer curled the corner of my mouth.
“You don’t know what could happen because of this; think of all the innocent…!” she protested. I put my hand over her mouth to silence her.
“I will do whatever it takes to achieve this,” I hissed in her ear. “At any cost, any amount sacrificed. I almost feel bad for anyone who stands in my way. And you won’t stand in my way, will you?”
Lashing out, she bit my finger. “I don’t have to do what you say, even if you are my older brother!” she shrieked in defiance.
My eyes narrowed. “Then I hope for your sake that I pity you when my creation is complete. Nothing will stand in my way to domination.”

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