Green Kryptonite

"Just long enough for them to stop fucking each other's brains out," Lex Luthor said as he tapped the console. "Anything over thirty seconds could cause implantation failure."

One finger stabbed a button. In the White Room, Supergirl and Lois Lane were locked in a deep kiss, and Superboy alternated strokes between their bodies, Kryptonian jizz churned into a white froth that slipped from cunt to cunt...and unseen above, a small panel in the ceiling flipped over, to reveal a clear dome. Inside was a spiky green mineral, light shards of raw glass joined together at a hub...and a sickly green glow filled the chamber.

Instantly, the trio of figures cried out. They writhed beneath the deadly radiations of the kryptonite. Superboy cried out, lost pace, and Supergirl's legs wrapped around him, drawing him in closer. The three fell together on their sides, hips humping together, Lois smashed between the two true Kryptonians as they rolled over and over, crying out in pain...

"Uh, Mr. Luthor?" Mercy Graves said. "Oxytocin and dopamine levels are spiking. They're definitely feeling pain, but I think they're...um...too excited and it's triggered some kind of masochistic response. They're getting off on it."

Burning lips bit into either side of Lois Lane's neck; Superboy on her left, Supergirl on the right, the powerful mouths and lungs bruising the flesh with super-hickeys as Superboy's throbbing member spat more of his precious genetic material deep inside her artificially de-aged twat.

The second ticked by, and Lex held his finger over the button that would retract the green kryptonite. Sweat beaded his brow as he frantically calculated his options. He needed to regain control of this experiment, but how?