She has more holes to explore

Even with that rock draining your powers away, nearby you have more potency than a mere human can possess and leaving her with your dick still standing proud is a crime against Sex

You grab Supergirl's hair, lift her head up and hiss " Now, you. Like a proper **** you are, will suck me off. And before you start protesting I want to warn your, humans will pay for disobedience. Should you bite I'll leave you here and go to some other city. But you know what? That city will see no quick and painless **** Metropolis got. No I will execute them slowly, prolonging every ****" You push your dick to her mouth and order "Lick! Lick, my little Superslut"

And she does start licking. She may have hate and disgust on her sperm painted face, but that doesn't change anything. She is nothing but you fucktoy. A toy that follows every order. Following your orders she licked your dick, your eggs, your fuckhole, then back to the dick, then she opens her mouth and engulfs your manhood with her sweet soft lips, then she allows you to push inside as far as you want and suck like an obedient cheap whore.

She may create plans how to defeat you, but with every second of humiliation she is closer and closer to becoming the sex **** she will be.

After briefly considering making her swallow all the load, you push Supergirl away, drag her exhausted body a little further from the Kryptonite and bark "Get on you fours, ****."

She follows the order, but not without saying "You gonna pay for that, asshole!" You can't tolerate behaviour like that and smack her perfect butt hard "****, you are not allowed to talk without permission, one more word like that and someone will die" You smirk enjoying the resulting silence "Speaking about assholes, you got a nice one, time to probe it" Not giving her a chance to understand what will happen you dig your fingernails into her elegant asscheeks and impale Superslut on your hard as steel dick, pushing further and further in like if you want to break her in two parts.