Three-year-old Molly stood at the window and watched her mother drive away. She didn't know where Mommy went, but maybe it would be one of those times when she would be gone a long time. If it was, maybe her big brother Brian would play with her. That private, special play that they only did when they were alone. She rushed out of her room to find her brother.

17-year-old Brian was sitting on his bed in just his boxer shorts , lounging against a big stack of pillows, watching tv. Mom had just asked him to watch little Molly while she went to the staff meeting at the hospital. She was a gynocologist with a practice and an office here at home, but often consulted with the hospital ob/gyn staff. Brian knew that these things lasted five or six hours, so he would have the house to himself and could relax or snack or whatever he wanted. And what he wanted more than anything today was his little sister.....

Just then Molly trotted in and, finding her brother, scampered over to him and scrambled up onto his lap, straddling his left leg. Her nightie had ridden up and revealed much of her legs. Only her thin panties separated her skin from his.

"Whuy doin'?" she asked with her face inches from his. Brian could feel his baby sister's warm crotch against his thigh, her knees lightly clasping and unclasping on either side. He rested his hands on her hips, giving them a little squeeze and subtlely pushing her down a bit more firmly on his leg. He couldn't wait to touch her...smell her...taste her.

"Oh, just watching cartoons," he answered casually. "Wanna sit with me?"

"'Kay!" she answered.

With only little effort, he picked her up, flipped her around and plopped her back down on his lap. But this time she sat with both her legs outside of his. He gave her a little tickle and buried his nose in her hair, taking a quick nibble on her sweet-smelling neck.

"BYIN!" she giggled, grabbing his hands against the onslaught.

"Ok, ok...no tickles!" he chuckled, and with her still holding them, rested his hands on her tummy.

Molly could feel a familiar lump pressing against her little bottom. It was her brother's "peenie". That made her smile because she knew it liked her and was trying to come out. 'Goody!' she thought - they were going to play their special play and she got that fluttery feeling in her tummy. She took her brother's hand and guided it down to rest between her legs.

Brian was now feeling butterlies in his own stomach. He flexed his fingertips, softly fondling his little sister's crotch through her thin panties. Molly pulled her knees up and set her feel flat on the bed, letting her thighs fall open for him. Now he used the flat of his hand to cup her little mound and gently squeeze her warm softness. That caused a short, soft "hm" in his baby sister's throat. Brian nuzzled his face against her cheek and kissed her.

"That feel good?" he whispered.

She smiled, nodding twice. Her brother always made her feel good. She adored him and loved whatever he did with her. He knew just what to do with her boobies, her tee tee, even her bottom. His mouth was warm and soft, his hands gentle. And she loved his peenie. It was yummy in her mouth and he did fun things to her with it.

Brian slipped two fingers into the leg band of Molly's panties and pulled them out and to the side, exposing her plump vulva. Her pussy was wide open like a moist, pink little flower. He touched a fingertip of his other hand to its tiny opening. Brian spoke to her in a soft, soothing voice.

"Mmm....what's this nice little thing?" he asked playfully.

"Tee tee!" she said shyly, smiling up at him.

Gently, he massaged the tip of his little finger around the mouth of her vagina. Molly looked down between her legs and watched intently as her brother explored her a bit deeper, working his finger into her up to the first knuckle. Over many months he had gradually opened her, and could now enter her fairly easily.

"It's a very pretty little tee tee," he murmured in her ear. She smiled and blushed. Again the double head nod; she thought so, too.

Brian brought his now-moist fingertip up to his face and inhaled the scent of her. It was intoxicating. Musky and organic; faintly fishy - and ultimately exciting. It thrilled Molly that her big brother liked her smell. It made her feel extra special.

"I have something nice, too," he said. "Know where it is?"

She giggled with delight and, raising her butt, reached under her. Finding the hard lump in Brian's shorts, she gave it a fond squeeze. The feel of his baby sister's hand on his straining cock was unbelievable, but he managed not to jump out of his skin.

"Good girl, you found it!" he said in mock surprise. "Know what that is?"

"Peenie!" Molly announced happily. It was nice and warm, and touching it made her feel excited and naughty at the same time.

"Wanna him to come out and play?" her brother asked.

"Uh huh!" Triple head nod this time.

Brian reached in through the front of his boxers and fished out his cock. It sprang up, bumping his little sister's crotch and sending a wave of lust through him.

"Oh my goodness; he really wants to kiss your pretty tee tee, doesn't he?" he murmured in her ear, and she cooed with delight. He nuzzled his little angel and kissed her again.

"Here, sweetie - " he said, slipping his fingers into her waistband, "let's pull down your panties."

" 'Kay!" she said, and lifted her hips up so he could slide her little pink underwear down to her ankles. Again, she opened her thighs wide in eager readiness for her brother's touch.

Brian took hold of his raging hard-on and placed its drooling head between her wide-spread legs. He was producing so much lubrication, her crotch was instantly slippery. The pink flesh between her plump little labia was warm and velvety soft; the feel of his dick wedged in its tiny opening, heavenly. As he rotated his cock head up and down in her snug little entrance, their combined juices made wet, squishy sounds.

Molly loved having her big brother's peenie kiss her between the legs. It was warm and gooey it made her secret place feel so good....

"Peenie nice ..." she cooed.

"You like that?" he said, barely able to get the words out.

"Yah," she whispered, all the time gazing down between her legs.

Now Brian began to slowly thrust at her. First, he would rub his dick in her little groove, then gently push in a bit. Rub, push. Rub, push. Little by little her tiny pussy spread and relaxed until at last, half of his his cock head had penetrated her. The feeling of being in her, even partially, was exciting like nothing else. With short half-inch strokes he began slowly, tenderly, fucking his pretty little sister.

Little Molly lay against his naked chest; a dreamy, contented look on her sweet face. The naughty, yummy feeling in her crotch spread upward, enveloping her like a soft blanket. And she knew that soon her brother's nice, warm juice would squirt in her tee tee, making her feel even naughtier.

It had only been a few minutes, but the feel of his baby sister, the sound of her, the smell of her, was becoming more than Brian could stand. He knew he wouldn't last much longer. Just then, Molly looked up into his face, and with heavy-lidded eyes, spoke softly to him.

"Make juice, Byin..." she murmured.

That did it. Hearing his baby sister asking him to cream her little pussy pushed Brian over the edge. The muscles in his abdomen tightened and his throbbing cock swelled even more as he felt his orgasm rise up and flood through him. He pushed his cock head up between her legs as far as he dared. And then, the sensation of ejaculating inside little Molly engulfed him completely. It was exquisite. His spurting penis was firmly pressed into the mouth of her soft, warm vagina, sealing its entrance. Brian pumped his semen into his baby sister again and again, making his body spasm and contract.

Molly knew her big brother was about to squirt in her tee tee when he started breathing funny and pushing his peenie firmly up between her legs. And then it happened; she felt the first gush of his special juice, then the turbulence of it squirting through the little hole in her hymen. The pleasant sensation almost tickled.

"Hnn!..." she cooed softly, her sweet face dissolving into a angelic smile. She could feel the pressure of the thick sperm filling her tiny vagina and spreading its warmth up through her tummy.

Brian was in ecstacy as he emptied his balls into his little sister, the whole time keeping his dick pressed snugly into her crotch. Finally, his orgasm slowed and the last of his cream escaped her plump little labia and leaked out around his throbbing cockhead. He lightly caressed her smooth, wet vulva and softly kissed the top of little Molly's head.

"Who's my juicy good girl?" he murmured.

"Moddy!" she answered.