"Suzie!" Katie cried.

"Katie!" her friend answered. The two 4 year old girls embraced, hugging each other tight.

Lucy Larson looked down at her daughter Katie and her best friend. Katie wore a short, sleeveless yellow dress and black maryjane shoes. Suzie had on a pair of tight blue shorts and a pink tube top.

Lucy thought Suzie's father, Malcolm Lester, always picked the cutest little outfits for his daughter, a pretty little brunette. When the girls hugged, their hair mingled - Suzie's dark hair tangled with Katie's light blonde pigtails.

Katie's hands were on the bare skin at the small of Suzie's back, rubbing gently. Suzie's grasping hands caused the back of Katie's dress to ride up, revealing her pink panties.

"Thanks for watching Suzie for the afternoon," Mal said to Lucy. She smiled at him.

"Oh, it's no trouble at all," Lucy assured him, "Suzie's never any trouble, and Katie loves having her over."

"Well, I'll be back before dinner..." Mal started.

"No, no," Lucy forestalled him, one delicate hand raised. "I'll feed her. I'll just get a pizza or something. You go have your 'daddy time'."

"Well, OK," the handsome young father relented, "I'll call when I'm ready to get her."

Lucy watched Malcolm walk to the car while the girls scampered upstairs to Katie's bedroom. She admired the way his ass looked in his tight jeans.

With a sigh, she turned to see what her charges were up to.

- - - - - -

The girls burst into Katie's room hand in hand, giggling excitedly. Katie turned and put her arms around her shorter, dark haired friend, squeezing her tightly while opening her lips for a kiss. Lucy's tongue was out before their lips touched, and Katie sucked it into her mouth hungrily, moaning as her tongue touched Suzie's. The 2 girls' heads tipped from side to side as they shared a long deep French kiss.

Katie's hands slid down her friend's bare back and over her round butt cheeks, squeezing them hard as they kissed. Suzie moaned in response and pushed her hips forward against Katie's crotch, and Katie's fingers dug into the seam between Suzie's bubble butt and her upper thighs.

Suzie's hands were busy on Katie's ass as well. Her fingers scooped under the hem of Katie's mini dress and slid underneath, gripping her friend's butt. Suzie's fingertips teased Katie's anus through the soft fabric of her panties.

Smiling and breathing heavily, Katie slipped from her pretty friend's embrace, grinning. She lifted her dress over her head, leaving the blonde 4 year old in her panties and shoes.

Just then, Lucy entered.

"Oh," she said, "Did you two want to use the pool?" Seeing her daughter removing her dress had brought her to the obvious - but incorrect - conclusion.

"Um, well..." Katie hedged. She really wanted to be alone with her friend.

"I don't have a bathing suit!" Suzie piped up, saving the other girl. Katie smiled gratefully at Suzie.

"Well, I'm sure you can borrow one of Katie's," her mom offered helpfully.

"Uh," Suzie thought fast. This time, Katie came to her aid.

"She doesn't like to wear other people's suits," the little girl offered. It was a thin excuse, but it was all the 4 year old could come up with on short notice.

"Yeah," Suzie jumped in, "I'd rather go naked than wear someone else's bathing suit!"

Uh-oh, thought Katie, she may have gone too far now.

Lucy Larson stood looking at the pretty, scantily clad girls, thinking.

"Well why not?' she said, "I mean, you'll just be in the back yard. No one can see you. Come on, let's go skinny dipping!" She turned away with a smile.

The girls looked at each other and Katie shrugged, smiling as she pushed her panties down and off.

- - - - - -

Lucy grabbed 2 towels and the camera on the way to the back yard. She snapped a few pictures of Katie and Suzie from behind, focusing on their cute round butts as they scampered across the patio to the little pool.

The girls squealed and splashed in the cold water of the plastic wading pool the Larsons kept in their back yard. It was small, but just large enough for 2 little girls to cool off in. The water was chilly, and the girl's nipples were hard, and goose bumps rose on their wet skin. Suzie snapped pictures as they played.

Both pretty little girls loved having their pictures taken, and soon they were posing for the camera. Katie and Suzie sat in the shallow water with their arms around each other, leaning against the side of the pool, grinning. Lucy took pictures of their naked bodies. Katie spread her legs apart in front of her, but her vagina was obscured by the water, so Lucy snapped the photo. Suzie followed suit, and the girls posed with Suzie's right leg crossed over Katie's left, both of their hairless pussies spread wide, but underwater.

Entranced by their innocent beauty and sensuality, Lucy continued to take pictures as the girls rose from the water on their hands and knees with their faces beaming at the camera, water dripping from their chests and bellies.

The young mother took photos of the naked little girls in a variety of positions. Suzie turned her back to the camera and leaned on the grass with her knees in the pool, her legs apart to expose her fat labia from behind. As she moved, Lucy could see her tiny pink anus winking at her, and snapped that picture, too. Katie followed and the two girls posed next to each other with their pale round butts aimed at the camera.

Lucy knelt behind them, zooming in to capture a picture of their assholes, side by side.

Katie sat in the pool with her legs spread again and Suzie sat in her lap in the same pose. Lucy got a great shot of their spread open labia, one atop the other.

After fifteen minutes and almost three hundred pictures, Katie's mommy said it was time to go in. The girls dried each other off, giggling, while Lucy entered the house.

"You girls go on up and get dressed," the red-faced woman called over her shoulder, "I'm going to call for the pizza and get ready for dinner!"

- - - - - -

There was no giggling this time when the girls entered Katie's room. They fell on the pink princess comforter covering Katie's canopy bed, Suzie on her back and Katie next to her. Katie leaned down and they shared a deep, passionate kiss that was far more adult than the average 4 year old would engage in. Katie's left hand trailed across Suzie's flat chest, pausing to pull on her hard nipples, then glided across her tummy to Katie's ultimate goal. Katie stroked Suzie's tiny clit with her middle finger, causing her friend to moan against her tongue. She slid the thin digit into the slippery gap between her puffy pink labia, pushing past the folds of her inner lips and into the wet hole inside. Suzie tipped her head back and moaned out loud as Katie kissed her throat, working her way down her friend's naked body, sucking on her nipples and dipping her pointy pink tongue into Suzie's belly button.

Katie slid around until she lay between the other girl's spread thighs, her face inches from Suzie's wet pussy. With one finger still deep in her tight pussy, Katie licked Suzie's clit. Suzie's body twitched, and the dark haired 4 year old girl clutched Katie's blonde pig tails in her hands as she rubbed her pussy against her friend's tongue.

"Oh, oh, put it in my ass," she panted to Katie, "Put your finger in my asshole. Please Katie!" Suzie loved to have her asshole played with. Suzie's daddy often fingered her and fucked her in her asshole because it turned them both on so much.

Katie pulled her slippery finger from Suzie's pussy and stroked the rough ring of muscle around her anus. Suzie lifted her hips from the bed to give her friend better access, and sighed happily when Suzie's small finger pushed past her sphincter and into the soft, warm confines of her rectum.

Fortunately, Suzie's preteen pussy was gushing, and the fluid coated Katie's finger as it slid in and out of her anus.

Katie latched onto Suzie's clit with her lips and flicked her tongue back and forth across the hard nub, bringing her friend to an orgasm.

Suzie's whole body went rigid and her back arched until her heels and shoulders were the only parts of her body touching the bed. Katie had to rise to her knees to keep her face in contact with her friend's pussy. She could feel Suzie's asshole squeezing her finger as she came, letting out a sound somewhere between a sigh and a groan.

When she collapsed on the bed, Suzie reached for Katie, who climbed up next to her to share another kiss. Suzie sucked on Kati's tongue and lower lip, tasting her own pussy. She then took Katie's left hand and lifted in to her mouth, sucking it like a small cock. Katie wrinkled her nose, knowing that Suzie was sucking the finger that had just been all the way inside her butt.

Sometimes Katie thought Suzie was kinda weird.

Suzie pushed Katie's shoulders back so that she lay on the bed and leaned over to suck on the little blonde's nipples, moving downward to return the favor by eating her friend's pussy.

Neither girl saw the motion through the gap between the slightly open door and the door frame.

- - - - - -

Lucy hurried to the computer after the girls got out of the pool and plugged the camera in. She created a file and put all the pictures she had taken today into it. She then plugged in a thumb drive and copied the folder onto that, deleting the original file and all the photos from the hard drive. She put the USB drive into the back of a junk drawer until a better, more secure location could be found. She took several minutes deleting pictures from the camera, leaving only the most innocuous shots of the naked girls. She left nothing that showed their private places.

When all this had been accomplished, she sat back, took a deep breath, and went to order the pizza.

- - - - - -

Lucy neared her daughter's bedroom door, hearing low murmured voices, not the giggling and squealing she had expected. She peered through the gap in the door and froze. There on the bed were the 2 girls. Katie was on her back and Suzie was lying between her spread thighs, her face in the little blonde's crotch. She put her hand to the door to enter when she heard her daughter moan.

It wasn't a moan of pain of discomfort or distress of any kind. It was a moan of passion. She watched, distressed but curious, as Katie put her hand on the back of her friend's head and pressed Suzie's face against her crotch, rocking her hips and rubbing her young bald pussy against Suzie's lips.

Lucy was torn between wanting to rush in and put a stop to the activity and not wanting to scare the girls. What they were doing was innocent and consensual.

Wasn't it?

Lucy watched, and her heart beat faster, and her breathing grew deeper and heavier.

Suzie's head thrashed between Katie's legs as she ate the 4 year old's pussy, gripping her upper thighs from underneath. Katie's head moved back and forth, her blonde hair flying loose from its pony tails and covering her face in gold strands.

Panting, Suzie raised her face from Katie's crotch. Her cheeks and chin were wet with a combination of Katie's pussy juice and her own saliva.

"I wanna try something," Suzie panted, her big brown eyes glazed with lust. Lucy thought it was strange to see such an adult emotion on such a young face, "My daddy does it to me and it feels really good," she finished.

"Uh, OK," Katie said hesitantly. Lucy continued to watch as Suzie directed Katie to turn around on her hands and knees with her butt pointed right at Suzie's face. Lucy's hand drifted to her short skirt, sliding down slowly to the hem and caressing her upper thigh.

Suzie pressed her face against the backs of Katie's thighs to lick her pussy from behind, her index finger tickling Katie's puckered anus. Moving her face upward, Suzie extended her small pink tongue and touched the wrinkled hole lightly. Katie turned to look over her shoulder at the odd sensation, then laid her head on the pillow she clutched in her arms. Suzie's finger entered Katie's wet pussy, sliding in and out as she lapped at her friend's anus, which was clean from being naked in the pool. Katie moaned and pressed her ass against Suzie's invading tongue. Suzie stiffened her tongue as much as she could to force it into her friend's ass, enjoying the feel of the tight ring of muscle as it closed around the tip.

Lucy's finger slid along the edge of her panties, dipping underneath to stroke her pussy lips, which were slick with her own juices.

Suzie was really into it now, tilting her head from side to side to force more of her small tongue into her friend's anus. She had both hands on Katie's butt cheeks, and was holding the twin globes apart to ease access to the small hole in between. Katie moaned into her pillow as her best friend ate her asshole.

Katie liked the odd sensation of her friend's tongue in her butt, but was happy when Suzie slid her finger back into her pussy. Katie liked having her asshole penetrated, but not as much as Suzie. She much preferred to have a cock, or a finger, in her pussy.

Suzie slid her finger in and out of Katie's hole, and the little blonde's orgasm got closer and closer.

Lucy stroked her clit as her daughter neared what was obviously going to be an orgasm, though she had been unaware that such a thing was even possible in a child so young. She stuffed a finger into her pussy as Katie moaned and squeezed her pillow tighter, her small body quivering as she came.

Katie lay on the bed on her side, her body sweaty and weak. Suzie climbed up next to her on her hands and knees.

"Now do me!" she said, smiling brightly. Katie looked at her friend and smiled. Her youthful energy returned quickly, and she knelt behind her friend, bending forward to kiss her slick pussy lips from behind.

From her position at the door, Lucy was able to see both girls' asses. She added a second finger to her pussy and gasped quietly as her pretty little daughter bent forward and licked her friend's pussy. Her eyes lost focus and she felt light-headed when Katie's small pink tongue came in contact with Suzie's asshole.

Katie tentatively touched her friend's pink anus with the tip of her tongue, wrinkling her nose in anticipation of a bitter or gross taste. The only reason she was even doing this was because Suzie had done it to her. And because it was so nasty and naughty.

Katie got a real thrill from doing naughty things - like sucking cocks and fucking strangers - and this was just about the naughtiest thing she had ever done, she figured. To her surprise, she didn't really taste anything. She pressed her tongue against her friend's yielding opening, and felt the same thrill Suzie had when the girl's sphincter closed around the tip. Katie lapped half-heartedly at Suzie's anus for a few minutes, then told her to roll over.

Suzie lay on her back and Katie went back down on her. The 4 year old blonde much preferred eating pussy to licking assholes, and she dove in with relish, her mother watching secretly from the doorway.

Lucy watched her beautiful little girl bring her friend to an orgasm, timing her own so that her groans and gasps were covered by those of the 4 year old. She slipped away from the door on rubbery legs, confused and conflicted. And horny as hell.

What should she do? The girls had obviously both enjoyed what they had done, and it clearly wasn't the first time they had done it. The activities were obviously consensual.

Could this just be an extension of the natural curiosity all children had about their bodies, and those of others?

She decided to wait, and do some research on the subject before acting prematurely.

- - - - - -

Mal came to pick up Suzie and Lucy showed him some of the pictures she had taken on the camera. She thought it was adorable how he stared raptly at the photos in obvious adoration of his little girl. His glance went from the pictures to his daughter, and to Katie. Lucy smiled when he asked her if he could get copies, and she assured him she would email him the photos.

She had no idea that he would use them to masturbate to.

Would she hesitate to send them if she did know?