"Oh god, Lance," Celia murmured.  Her body was pressed up against the bathroom stall, her skirt pulled up above her waist, and her twin brother rapidly thrusting in and out of her moist cavern.  The twins had snuck off to the bathroom shortly after eating lunch, and were now lost in a risky moment of passion.  Celia panted as Lance kept the pace going.  Her right leg wrapped around her twin's thigh as her other leg kept her balance.  She ran her fingers through his hair while he kissed her neck and rubbed her immature chest.  The ten year old kittens were oblivious to the world around them, lost in a sea of passion and lust.  All started because Celia wanted to have a little extra fun and left her panties at home.
  "Ah, I'm almost there," Celia moaned, trying to keep her voice down.  Her body started to twitch and her twin thrust harder.  Soon they each reached their climax.  Lance gave a big thrust as he sprayed his seed into his sister and Celia's body tensed up as she gasped for breath.  The two eventually relaxed, their legs weak from the shared experience.  Celia and Lance slowly made their way out of the stall and made sure to fix their hair and clothes before rushing back to their classroom.

Mr. Andrews glared at the kittens as they entered the room, three minutes after class had resumed.  "Sorry we're late," Celia said, "I got a little caught up in the bathroom.  Lance stayed to make sure that I wasn't late, but I guess that didn't help."  She smiled nervously, hoping her excuse was good enough.  However, Mr. Andrews noticed a thin line of semen slowly making its way down the girl's leg.
  "Miss Richter, it seems as if you forgot to clean up something," Mr. Andrews said, motioning toward her leg.  "Why don't you go back to the bathroom and wash yourself.  Mister Richter can stay here, and I would like to see both of you after school."  Celia blushed heavily, realizing what her teacher meant, and rushed off to the bathroom while her classmates giggled.

After school, the twins met with their teacher as he had requested.  "Now then, I can see you two were doing things you shouldn't be doing on school property.  I'm guessing one of you has a thing for public sex?" Mr. Andrews said.  He looked at the kittens as they fidgeted.  "Well, that doesn't matter.  While I don't think that this incident will dissuade you from public sex in the future, I do hope you take better care at not getting caught."  The twins nodded, fearing what punishment they might have to face.  "You two are bright young children, and I don't want either of you getting in any serious trouble.  So please, when you're at school, focus on your school work and less on screwing around.  I'm sending you home with a letter, and I already emailed your parents to let them know the letter is coming and that they should probably come pick you up as I'm sure the buses have already left."
  Lance and Celia looked at each other with fear on their faces.  They certainly didn't want their parents to know.  "Well, that's about it.  I hope you two behave from now on," Mr. Andrews said.  He waved toward the door and the kittens hastily walked out.