Love the idea of Hero being gagged and bound, stretched across Supervillain's desk while the two villains chat.
Supervillain freezebrands a symbol on Hero's body to warn other villains not to touch them. Then Supervillain proceeds to stich up some gnarly wounds Hero got during capture.
"You're a feisty thing," Villain comments as Hero grunts beneath their gag. "But now it's double the price to pay."
"They've already paid a part," Supervillain remarks. "Leave us so they can pay the rest."
Sniggering, Villain leaves. Once the door closes, Supervillain traces the brand they left on Hero's skin. Hero struggles in their bonds, shouting something unintelligible under their gag.
"Oh, you have something to say now?" Chuckling, Supervillain pulls the gag free from Hero's jaws. "Let it out, now," They say, cupping Hero's chin.
Hero turns away defiantly, but Supervillain can see their eyes are bleary.
"There, now, don't be shy. Whatever those things pick up, I'll have erased," Supervillain says, gesturing to the security cameras.
"Ha, like that'll make me feel better," Hero says, but their chest rises and falls unevenly.
Supervillain leans over them, "Don't tempt me, Hero. I wouldn't want to pop those stitches out."
"You're a sadist," Hero spits out.
"Mmm, pity that's your type," They draw out a long needle. "But heroes love to be martyrs, don't they?"
"What's that?" Hero asks, voice too stiff and eyes too wide.
The needle pierces their skin. They shudder immediately and go limp.
"A little something I've wanted to try on you for awhile. You can feel it, can't you? A thousand pinpricks under your skin," they draw their hand along Hero's navel, "you're feeling hot now...and bothered."
"Shut up--" Hero gasps, face flushing redder than the rest of their body.
"The lethargy will kick in soon. When the adrenaline has nowhere to go."
"Shhh, shh, you haven't slept, *really* slept for some time, have you?"
"Like you care," Hero says, but their venom is fading.
"I do care. Can't torture you properly if you're exhausted, remember?" Supervillain grins as Hero's efforts to fight the sleep sap away. "I am a sadist..."