One chilly autumn evening, sun slanting through the bedroom window, Celia laid on her shared bed, a book in her hands, and feet kicking back and forth in the air.  Her parents, curled up on the couch downstairs, were watching a movie, Lance was in the shower, and Devin was next door playing with Krystal.  Even though it was only Friday, she liked getting her homework out of the way early.

  Thirty minutes, and Celia was only halfway through the assignment.  She let her feet fall down on her mattress, shifting her weight to her left side, black and white furred tail swaying.  Mid drop, she felt her foot caught, and a tongue lick from toe to heel, sending a shiver up her spine and a tingle through her groin.  She moaned softly, but quickly regained her composure.

  "Lance!" Celia admonished, looking over her shoulder at her twin. "I'm busy with my homework!"

  Lance knelt at the edge of their bed, bare fur still slightly damp from showering.  "But sis," he whined, "I really wanna have some fun.  Can't you finish it tomorrow?"  He licked Celia's foot again, causing her to shiver and moan.

  Shaking her head, Celia tried to regain her focus, trying to push Lance away with her free foot, but it only seemed to encourage him, licking with increasing enthusiasm.  Watching, she saw him rise, and climb the bed, his erection bouncing with each movement.  "I'm warning you, Lance.  I'm busy with homework.  I don't have time for-" 

  Thrusting himself inside, Celia yelped, feeling Lance's invading cock spread her lips apart.  He started thrusting in and out rapidly.  The anger of being interrupted melted away, the sensation of their coupling washing over her.

  Celia fumbled for her bookmark, haphazardly placing it to save her spot and tossing the book aside.  Assisted by Lance, she rolled over to her back, bringing knees to chest, giving him better access to her feet and penetrate deeper.  Taking the hint, he took her toes in his mouth and started licking.

  Rhythmic thumping of the mattress filled the room, Lance thrusting into his twin’s love cave.  What began as an annoyance quickly turned into an extremely arousing scenario.  He knew exactly what Celia liked.  “Ffffff…” Celia hissed, feeling her brother’s tongue slide over her sole.  He began to suck on each of his sister’s toes, causing her arousal to spike.

  Soon, Lance felt Celia pull her foot away, and relented.  Her legs dropped to his hips, hooking around him, pulling him closer.  Leaning forward, Lance smiled, rubbing her developing breast with one hand, and steadying himself with the other.  His eyes connected with hers, and with a surprising quickness she grabbed his face, and pulled him in for a passionate kiss and embrace.  Their mouths opened, letting tongues dance in the other’s mouth.

  Celia broke the kiss and gazed lovingly into her brother’s eyes.  “Lance, I…  F-fuck.  Right there, yeah.  Mmmfff… Lance, I t-talked to mom, and…  Oh yeah…”

  “What is it, Ci-ci?” Lance smirked, knowing Celia both loved and loathed that nickname.  Or rather, she hated how the nickname made her loins feel whenever he said it in that childish voice.

  “You ba-bastard!  Ah!  I-I had my first period a c-couple weeks ago.  Which means…  Fuck.  W-which means that my next p-period may be in a week or t-two.”  Celia huffed, knowing what she was saying.  “Mom t-thinks I may be fertile right now.”

  Lance slowed his thrusts a bit, taking in the news.  “So, what do you want to do?  Do you want to try for a kid?  Make a baby earlier than our parents?”

  Celia grabbed her twin by the ear and pulled him close, making him yelp.  “I don’t know if we’re ready for it yet, but I’ll be damned if I’m going to let you pull out of me.  You are going to make me cum and you are going to squirt your seed in me as much as you possibly can.  Every last drop from that cock of yours better end up in my womb, or else you’ll regret interrupting my homework for this.”

  Nervously, Lance resumed thrusting, sliding a hand down to Celia's groin.  He thumbed her clit, making her whole body jerk from the sensation, and squirt a little of her love juice.  “Yes, rub it,” she begged, while he spread it over his member.

  Thoughts of putting a baby into Celia dominated Lance's thoughts.  If their parents could make them at the age of thirteen, why couldn’t have babies at eleven? The idea of getting her pregnant only served to enhance his arousal, balls churning with desire, while she pushed up against him with every thrust of his hips and flick of his thumb.  Their moans grew loud, lost in the intimate passion of the moment.  One final thrust, and he exploded into her.  He mashed his groin into hers as hard as he could, pushing his baby maker as deep as he could get it. 

  Celia felt hot spunk flood her, rushing into her womb, Lance flicking her clit one last time, and the touch sent her over the edge.  Wrapping her legs around his waist, she pulled him in with all her might.

  The orgasming twins embraced, a tight hug and passionate kissing sweaty bodies pressed together.  Lance knew he was going to have to shower again, but so did Celia, and they could shower together in a few minutes.  For now, it was all about making sure his seed took root.


  Down in the living room, Celia and Lance's parents listened to the sound of their cubs' lovemaking, having long since paused their movie.  Vera smiled at her own twin.  “Hey hon, did you know Celia had her first period a couple weeks ago?”

  Travis leaned into Vera.  “I didn't.  I don’t think I’ve heard those two be so loud before.  They’re usually more considerate about the noise.  Wonder what's gotten into them”

  “Celia might've told Lance about her fertility.  After all, we got a little wild when we were first trying for a baby.”

  “I guess we did get a little lost in the moment that first time, huh?” Travis chuckled, pulling Vera in for a hug and kiss, and hitting the play button on the remote control.