This part of Jaycee is a continuation of her "date" with Alex and about Jaycee's introduction to making sex films.  I hope you can follow a little girl's thoughts and feelings as the movie making unfolds. Take it slow and read carefully.  You will get to the next good part in due time.
In the middle of the night, a sleeping Jaycee attempted to roll from her left side to her right, and met some kind of obstruction, which woke her up.  A naked man was in her bed!  Wait!  She was naked too!  This woke her all the way up in a hurry, and she remembered what had happened earlier.  She snuggled up against Alex's warm chest, and felt his now soft, small, (compared to last night,) cock.  She reached down and clasped it loosely in one small hand.  She tried an experimental squeeze and a slow stroke like Alex had showed her to do... 
There came a break in Alex's snoring and a false start or two before it started again. The big body beside her moved so that the stiffening rod in her hand seemed to be thrust farther out toward her hand.  Intrigued by the control she had over this big man, by merely manipulating his little joy stick she had clutched in her fist, Jaycee gave it a couple of quick strokes.   This was so much fun!   She pulled the skin back on his now erect and hard cock.  Then she brought her other hand in to feel the smooth skin of the head.  It almost felt hot to her touch.  She squeezed it between fingers and thumb.  There were grunts, disrupted snores, a sudden start, and then only quiet breathing from the man.  
Uh oh, she had done it now!  He was awake.   Jaycee pretended to be fast asleep.  Then a big warm hand moved down over her shoulders and slowly down over her back.  Jaycee suppressed her giggle with some difficulty.  The hand moved down over her soft little butt.  What was the big lug up to?  He was causing all kinds of thrills and tingles to start flowing through her lower belly area.  Jaycee couldn't resist giving the big shaft a squeeze to see just how hard it was getting.  The hand continued it's slow journey down over her shapely little butt.  Now it was causing her crack in front to start getting wet.  She could feel the warm flush of her arousal creeping up her chest from her hard little nipples.  Jaycee tried to stifle another giggle at his slow intrusion, but a very un-ladylike snort escaped.  Another giggle escaped as one large finger traced the line of her sensitive butt crack.  She tried another sly little squeeze of the shaft and it brought a jump from the cock in her hand.  
Alex drove one finger into the crack, found the puckered little hole, and began to stroke it gently.  The giggle changed to a squeal and laughter.  Alex rolled a little, and got one knee between Jaycee's legs, spreading them and rolling her onto her back.  Then he slid his chest over her supporting himself on one elbow.  His other leg moved between her thighs, spreading them more.  Jaycee found herself holding his erection to her slit at just the right spot.  She rubbed the head against her clit a couple of times, just for the thrill.  She didn't need it, she was already sopping wet.  Then she lodged the head in her opening, and it slipped right on in.  Letting go of the shaft, she moved both hands down to the crook of her knees, and pulled her legs up and out.  Alex plunged deep into her vagina with one easy thrust.  Now there was only one point of contact between their two bodies.  The outer skin of his cock, and the inner skin of her pussy.
"Oh Alex!  That feels so good!"
Alex just grunted and made a small adjustment that made it feel even better.
"Aah!"  Jaycee murmured, and made her own little adjustment of hips and rear.  The shaft slipped in another half inch.  That one really got her attention!  That little move got her clitoris mashed up against his wiry pubic hair, and up against his firm Pubis, just above his cock shaft where it emerged from his body.  What a pleasant shock that was!  All the muscles around her vagina contracted at once in a quick spasm.  
"Oh!"  Alex felt the quick squeeze and release of his shaft.  He lay there quietly for a minute, savoring the tight hot sheath around his erection, and the feel of the small body quivering against his much larger one.  He thought how these kinds of moments made the dangerous but exciting chase of young girls so rewarding.  He thought of his other reward for this conquest.  Money in his pocket from sexy pictures of little Jaycee, and the thrill of watching and capturing on film the taking of this little body by others like himself.  He had big plans for little Jaycee.
Jaycee was enjoying the feeling of warm fullness in her loins as she waited for him to take her.  She had loved him since he had first showed an interest in her, and now she was envisioning their life together.  Once she was old enough, maybe in a couple of years, they could be boyfriend and girlfriend. Then get engaged and married.  He would be her lover, and also the father she had never known.  She smiled and wiggled her bottom around his large shaft, as she thought of their life together.
When Alex felt the little wiggle, he began a slow stroke, withdrawing almost all the way and slowly back in again.  After only a couple of strokes, Jaycee began to respond, moving her hips and rear to get the most sensation and friction that she could from each slow stroke.  A gush of thrills and tingles surged through her body and build up in her mind and body like a lake builds up behind a dam.
The size difference between their bodies was such that the top of Jaycee's forehead barely came to his chin.  When Alex had been deep inside her, she had clasped her knees to pull her thighs out to right angles from her body.  Now that Alex was making regular shorter strokes Jaycee held her arms around his neck and back as far as she could reach, and dug her fingernails in to him to help her control his strokes.  Her legs were no longer wide spread, but now were wrapped around his upper thighs and her little heels dug in as she tried to control his body so as to get the most pleasure that she could.
Waves of emotions washed through Jaycee's body.  Alex also felt those waves.  Sometimes he had to slow his stroking to regain control, and at these times he would look down between their bodies and the faint rays from her nightlight would show his large shaft nestled in the vee of the junction of her thighs, almost impossibly large shaft going into the small, hairless body.  The contrast between his wide, hairy torso, and her tiny white little body was such a tremendous turn on for him.
Jaycee had never been able to accept that her own father had not loved her enough to stay in her life.  He left when she was a tiny baby and never came back.  She vied with her girl friends for attention from their fathers.  She would have been an easy target if any of them had cared to pursue her.  She had been an easy conquest for Alex.   At this moment she could not have been happier.  Her big man was there with her, on her, and in her.  He was causing her to have the most delightful feelings ever.  She squeezed Alex tightly with her arms and legs and kissed his chest.
In response, Alex almost doubled the pace of his strokes.   This was the kind of fucking that Jaycee loved the most.  Her good feelings almost doubled in frequency and intensity.  The waves of pleasure grew stronger and filled the thrill reservoir inside her.  She had several small orgasms, each peaking and fading in a few seconds.  She felt the big one coming; the one Alex never quite had been able to hang on long enough to bring her up to.  Tonight seemed to be different.  He was not starting to grunt out his climax yet.  She was almost there...
Then the dams burst all at once and all the thrills and tingles went racing through her body in a flood of pleasure that reached into and all around their connected parts.  Her orgasm seemed to flow into Alex and bring on his orgasm too.  He thrust deep into her and held her tight as he spurted hot semen deep into her body as he grunted out his pleasure.  Their bodies strained together for almost half a minute and then they both relaxed.  In only a couple of minutes, Jaycee was asleep in his arms.  
Alex gently disengaged himself and slipped down enough to kiss the sleeping girl on the lips.  Then he carefully got out of bed, gathered up his clothes and quietly dressed and then left.  The little girl was exhausted and slept on, but she was not used to sleeping on her back.  She rolled  on her side in her sleep, and her thigh went into the slimy puddle that had been cooling between her legs.  Jaycee woke up with a start.  She stuck one hand down there and felt what it was her leg was in.  "Oh, crap!  Another puddle."  She muttered, and then she felt around for Alex.  Not finding him, she curled up into a small ball and was asleep in seconds.
The next morning both Leona and Jaycee slept in.  When they finally got up, both were in the good mood that sexually satisfied women are in the next morning.  Most of the day was spent laundering towels and bed linen, after they had both taken long showers.  Leona was in such a good mood and feeling so flush with money that she allowed Jaycee to take the day off from her modeling jobs and play with her little friend Felice.  Jaycee thought about telling her friend about her encounters with Alex, but decided to ask Felice to come for a sleepover soon where they could really discuss it.
A couple of days passed and the call from Alex came.  He needed Jaycee all the next day for a big shoot.  When Jaycee ran up to the door and greeted Alex the next day, she expected him to take her to the bedroom first.  He escorted her to the studio instead and to her surprise, there was an older man waiting there.
"Jaycee, this is Don.  He is a model too and you will work with him today.  Jaycee wanted to protest, but she didn't even know what might be coming so she held it in.  Alex had said the pay would be very good today.   Leona had lectured her on doing what she was told.  Besides, the old guy looked to be quite harmless.  Still, Jaycee was a little upset.  An excitement had been building in her at the thought of being alone with Alex.  Don did not get a very enthusiastic or friendly greeting from her.  Alex noted this and gave Don a look that told him to "go easy on her."  Don nodded his agreement.
Alex explained the story they were going to film to Jaycee.  She was to be an innocent little girl on her way to the playground when she saw a man and his cute little dog sitting on a bench.  
"Where is the dog?"  She asked.
"Never mind."  Alex told her.  "You’ll see it when the time comes and you will really look surprised and curious."  He continued to tell Jaycee and Don the plot, and her eyes got bigger and bigger.  She grew more and more dismayed.  Finally she took Alex's arm and tugged him into the dressing room.
"Do you mean I have to let him touch my legs and all that stuff that you did?"  She asked. 
"Well, yes.  But it will just be acting, it won't be like you and I were."
"Oh!  I see."  Jaycee said.  But she didn't see.  She thought that was something special for boys and girls in love.  She decided to do his silly acting, but by golly, she sure as heck wasn't going to like a bit of it.  "All right."  Jaycee said, but it wasn't.
Alex shot Don another meaningful look as they came back into the studio.  Don nodded again.  This was going to be a tough one.  He wished Alex would stop encouraging these little girl romances.  It just made his job harder when it came time to make the real money.  Well, he could cope with it.  He had done it before.  And so our little show begins...