Just Negatonium, but with a few elaborations Ultraboy had been unaware of…

“Regular negatonium makes me and her both dumb, weakens us, hurts a lot while making us randy and makes us submissive, more submissive,” Ultimamom said writhing against his lap, trying to provoke a spanking.

His hand was actually rising to give her what she wanted, when it stopped. “Regular negatonium? Are there other forms of negatonium?” He asked.

“Not naturally, but I attempted to modify negatonium to have other, more useful effects, as well as my attempts to produce a vaccine against its effects have produced a number of different forms of negatonium which have…unusual effects.”

“Such as?” Ultraboy asked, caressing her bare ass and the duralexx covered portion equally…

“Pink negatonium, which made us uncontrollably horny, way more than regular negatonium. Testing that was a bit awkward as Ultimagirl was not inclined to take no for an answer after she was used as the test subject…”

Ultraboy spanked her ass hard. “You have that story, and you told me about what you wanted to do to a superhero? Man, you just don’t get guys at all, do you?”

“Sorry, master,” she said, arching her back to lift her ass in hope of another blow, not coincidentally pressing her tits down on his lap.

“What other forms of negatonium did you make?”

“Red made us angry. Then there was black, it split Ultimagirl into two separate people, one good, one evil, it would have been really hard to get them back together, as they both had her full powers, if not for the fact that, well, I still had the pink negatonium on hand…and her goodness was no match for her horniness…”

Ultraboy’s cock hardened noticeably at that one and the image of two Ultimagirl’s wrapped around each other. “You do get men, don’t you?” He said, suddenly suspicious.

“Yes, master, but the negatonium is true, as was the testing, but I restrained her first, in both instances, so letting it pass wasn’t difficult.” Ultimamom admitted.

Ultraboy spanked her twice in his disappointment, but he had to admit, he was hard as a rock when Asa contacted them, informing them that the way was clear.