The lion continues purring, and licking around Derrick's hole. He could tell that the boy was enjoying this, and he continued because he needed to do two things quickly, before Ms. Hawk decided to intervene. His tongue began to penetrate a bit into the opening. The kid was clean enough. So he pushed a bit more letting the rasps of his tongue gently stimulate the opening.
"Uh, oh yeah more," he heard Derrick moaning ... and that was permission. The lion moved up further, letting part of his weight rest on the boy's back, and he slid his lionhood into the moist waiting hole, and paced himself to Derrick's moans and whimpers. The lion reached down and breathed his hot breath on Derrick's neck, still purring, and heard the boy whispering, "lion... wish I ... like you... fuck... me..." and it would have been very rude not to continue. He came, for the first time of many, a quick spurt, and his penile spines extended. Not actually sharp or hard (yet) they provided an intense feeling as they dragged across the young man's prostate, and Derrick felt himself twitching and precumming. The lion put his muzzle down by the young man's face and shared his breath, still purring all the time.
Derrick could only feel the intense pleasure radiating out through his body. His ass was having what felt like a repeated orgasm and his cock was just growing harder and harder, and yet he felt stronger and stronger. The lion was breathing his air and he couldn't really catch his breath, and it was making him dizzier and yet he felt so wild, so feral. He was being fucked by a lion, and he should have been terrified but that purring surrounded him, making him feel so good. He felt an answering purr rising in his own chest. The bed covering was sliding under him, and he grabbed it with his outstretched hands and he felt his nails flex into and through the cloth. His feet touched the floor during one slide, and he grabbed and dug in with his toes. The thick twisted-rope carpet let him stop sliding and his hind-claws dug in. He pushed back against the lion's weight, which wasn't heavy now.
The lion watched Derrick's face pushing out into a muzzle, his eyes closed and his body covering itself with golden fur, and he whispered into the now-rounded and mobile ear, "Eímai Androklís, my name is Androcles. Hello. Eíste panomoiótypo dídymo adelfó mou, you are my identical twin brother. As soon as we both cum."
Derrick moaned, feeling something push out from his lower back as another three strokes from the lion across his prostate made him squirm and push back hard. The weight on his back was definitely lighter. He moaned and growled and purred.
"Do it, finish us off," he said in a deeper growl.
The lion grabbed his new twin brother's neck-scruff in his teeth and bit just hard enough to hold him and Derrick felt the instinct that made him submit himself involuntarily, and they both exploded in white hot pleasure.
When he came to, Derrick was lying on the bed panting, and his lion-brother had disengaged, and was grooming his neck with long rasping strokes of his tongue.
"That was so amazing," Derrick said, and then he opened his eyes and saw his paws. "How am I a lion?"
"Not the same way I am a lion. But we are twins now. Kirke's blessing remains but her curse is weakened as we share it."
"I don't understand. Am I speaking Greek? I'm speaking Greek."
"That's part of being twins. Our psyches are now joined."
"Awesome. But what will my parents do when they find out?"
"They will have their own changes to worry about," Androcles answered. "Now, let me look at you."
They both got off the bed. Androcles pushed the bed coverings back into place, while Derrick looked at himself in the long mirror that covered part of the closet.
"I can't ... we look exactly alike!"
"Yes. Thank you for permitting it."
"What do we do now?"