Dr. Alan Grant, Lex and Tim are making their way through Jurassic Park. It has been an action packed though stressful day. They are all tired and very dirty. It's getting late and Alan knows they need to find somewhere safe from the dinosaurs to spend the night. Far in the distance, they hear a roar but Alan ignores it hoping that by staying calm himself, the children won't be so scared.

Another fearsome roar splits the air. "Are you hearing this?" Says Lex.

"Come on, Tim. Come on, hurry up. Let's, uh, get up this tree." Says Alan, finally deciding they need to find somewhere safe to spend the night.

"Oh, no!" Groans Tim

"Come on, Tim, it's okay. Try up here" says Alan encouragingly having found a tall tree.

Lex, Tim, and Alan climb up the tree. Alan is behind, watching the two children as they climb, giving them a push up when they need it.

"Oh, man. I hate trees." Tim whines unhappily.

"They don't bother me!" Lex says.

"Oh, yeah, well, you weren't in the last one." Grumbles Tim, refering to his recent experience in the crushed SUV.

The three can hear the hoots of the animals. Some are almost musical. Near the top of the tree, the three of them sit on a flat place at the junction of several branches. It's an incredible view. The sun is setting but they can see in all directions across the park even though a mist is developing. The moon comes out, casting an eerie glow over the scene. Most striking of all are sauropod heads, at the end of long necks, that tower above the low lying mist.

"Hey, those are Brontosauruses! I mean, uh, Brachiosauruses." Exclaims Tim.

"They're singing." Alan smiles. He moves over to a higher branch and hoots loudly, trying to imitate one of the calls. Immediately, two of the heads turn in their direction and hoot back.

"Shh, shh! Don't let the monsters come over here!" Lex is panicked.

"They're not monsters, Lex. They're just animals. These are herbivores." Says Alan.

"That means they only eat vegetables." Grins Tim. "But for you I think they'd make an exception."

"Tim..." Alan admonishes.

"Oh, I hate the other kind." Whines Lex.

"The other kind just... do what they do." Shrugs Alan. He finds a solid branch and settles himself on it, leaning back against the trunk of the tree, with a little room on either side of him. Lex and Tim nestle up next to him. He is surprised, but accepts that they need comforting. Satisfied that they are reasonably safe, they settle in for the night. Something in Alan's pocket pinches him. "Ooh! Ah! What's that?" He winces.

He pulls the velociraptor claw he'd unearthed in Montana on a previous archaeological dig from his back pocket. He and the kids look at it.

"What are you and Ellie gonna do now if you don't have to pick up dinosaur bones anymore?" Lex asks Alan.

"I don't know, I guess... I guess, we'll just have to evolve too."

"What do you call a blind dinosaur?" Asks Tim.

"I don't know." Says Alan. "What do you call a blind dinosaur?"

"Do you think he saurus."

Alan chuckles.

"What do you call a blind dinosaur's dog?" Says Tim.

"You got me." Replies Alan.

"A do you think he saurus Rex."

Alan chuckles again.

"What if the dinosaur comes back while we're all asleep?" Asks Lex.

"I'll stay awake." Replies Alan.

"All night?" Lex says with skepticism.

"All night." He confirms.

After a few moments silence both kids finally close their eyes. Dr. Grant lets the velociraptor claw fall to the ground. Tim falls asleep but Lex is restless. Alan wraps his arm tighter around her, hugging her close.

"Dr. Grant..?" Lex whispers.

"What's the matter Lex?" Alan smiles trying to sound calm and relaxed.

"I'm scared!"

"You've no need to be scared." Alan soothes. "I won't let anything happen to you or Tim."

A tear rolls down Lex's cheek. "I don't want to die, I... I haven't even kissed a boy yet!"

"Hey Lex, don't talk like that! You're not going to die." Alan hugs the child tighter.

"Will you kiss me... please Dr. Grant?" Lex whispers.

Alan smiles indulgently and plants a chaste kiss on Lex's forehead. Lex looks into Alan's eyes for a moment then kisses him on the lips.

"Whoa there tiger!" Alan recoils in shock. "There's no need for that."

"Please!" Lex sobs, tears running down her cheeks. "I might not get another chance!"

Alan, seeing how upset the young girl is, relents and kisses her on the lips. It's a lingering kiss and he can sense the passion she feels. He opens his mouth slightly and gently probes her mouth with his tongue. Lex responds in kind, pushing her tongue into Alan's mouth.

Lex groans softly with desire. She takes Alan's hand and places it on her muddy blouse over her breasts. Alan tries to pull away but Lex holds him there tightly. He can easily overcome her strength if he wants to but he can feel the child's need and proceeds to caress her.

Alan can feel the small soft mound of Lex's developing breast under his palm. He is aware her nipple has hardened under his thumb, even through the muddy fabric of her blouse and training bra. He knows what he is doing is wrong but he too feels the desperation of their plight and secretly fears this could be their last day alive so why not seek some comfort in each others company? He pulls Lex's blouse up and slips his hand under the thin elastic fabric of her bra. Lex gasps and stops kissing Alan, looking into his eyes.

"Oh yes!" Moans Lex. She continues kissing Alan with even greater passion.

Alan, emboldened by Lex's acceptance of his sexual advances, moves his hand down between the child's legs. Lex squeezes her thighs together and squirms herself against his hand.

Suddenly Alan's cock swells and he is consumed with an urgent need to fuck Lex, even though she is only a child. He hastily undoes her jeans and pushes his hand into her panties caressing her soft silky labia. He can feel a few hairs begining to grow above her virgin slit which is hot and dripping wet, confirming to him her mutual need.

"Oh God, Lex, I need to fuck you... I must have you now!" Alan breathes lustily.

"Oh yes, Dr. Grant! Lex gasps. "But... I haven't done it before!"

"It's okay Lex... you do want me to fuck you don't you?

"Yes... yes... please!" Lex whispers passionately.

Alan is struggling to pull Lex's jeans and panties down to her knees so Lex helps him. He undoes his own pants, freeing his stiff, throbbing cock, and lifts Lex onto his lap with her back to him. He pushes up between her thighs, his glans ploughing hungrily between her wet virgin lips, searching for the tight secret entrance to her womanhood. Finding his goal, he enters her from behind, thrusting into her hot depths roughly and with urgency.

"Argh!" Lex yelps at the momentary stinging sensation as her hymen surrenders her childhood. She feels Alan's cock plunge into her youthful depths, filling her up. "Oh! Oh! Yes... oh yes!" She gasps.

Lex throws her head back against Alan's shoulder and raises her arms to grab a higher branch for support. Alan pulls Lex's blouse and training bra right up under her chin, exposing both her breasts. It's a bit too dim to see clearly but he can just about make out two smallish pool ball sized lumps in the moonlight, topped with darker quarter sized areole. He vigorously caresses her breasts, roughly pulling at her nipples as he continues to thrust into her from behind.

"Argh, fuck... yes!" Groans Alan. "You're cunt is so tight! You're a great little fuck Lex!"

"Oh Dr. Grant... oh yes... so good... 'please don't stop!"

At this point, Tim is woken by the noise and movement in the tree. He sees what Lex and Alan are doing and leans in between Lex's legs for a better look. "Dr. Grant! What are you doing to my sister?" He squeals.

"Oh Tim! Lex and I are, er... we're making love." Alan gasps.

"Go away Tim... leave us alone!" Lex mutters distractedly.

Tim stays where he is, watching open mouthed as Alan continues to thrust his cock into Lex's pussy. He unzips his shorts and begins rubbing his own boy cock excitedly.

This is too much for Alan. "Oh fuck Lex! I'm gonna cum... I'm gonna cum in your tight cunt!"

"Argh... argh... argh!" Lex too has reached the point of no return. She is consumed by wave after wave of orgasmic pleasure, the like of which she has not experienced before. Her young body is squirming and jerking uncontrollably in Alan's lap.

"Oh fuck... I'm cumming! Arrrrgh!" Alan thrusts forcefully into Lex's cunt as his seed erupts from his throbbing cock.

After a minute or so, both lovers are coming down from their orgasmic highs. Alan looks at Tim and watches him still masturbating. He is impressed by the size of the young boy's cock, it's at least as thick as one of his (Alan's) fingers but looked to be a good four or more inches long. He thinks it would be unfair not to include Tim... after all, he too should enjoy the ultimate sexual experience in case this is indeed their last day.

"Er, Lex... I think we should let Tim fuck you too." Alan says.

Lex looks at Tim stroking his own cock. "Ew... that's gross! He's my brother!"

"But this could be his only chance to experience love making too... it's only fair." Alan slides a finger between Lex's pussy lips and strokes her sensitive clit.

"Oh fuck!" Lex gasps, squeezing her thighs together and humps Alan's finger. She is suddenly desperate to feel another cock in her pussy and if that cock belongs to her own brother... so be it! "Mmm, okay... I'll let him do me!" She gasps as she pushes her jeans and panties all the way down to her ankles.

Alan pulls Tim's shorts and pants down then helps him to shuffle across between his sister's open thighs. He gives Tim's cock a few strokes, checking to see if he's hard enough yet to fuck his sister, and is impressed by the young boy's solid boner. He pulls Tim between Lex's open thighs.

At first Tim's cock misses it's intended target and slides up her wet slit to rub against her clit. Lex moans with need and humps her wet, dripping pussy on her brother's hard cock. Alan takes Tim's cock in his hand and aims it at Lex's pussy. The young lad instinctively knows what to do and starts thrusting into his sister's eager cunt.

Lex sighs with pleasure. She's not disappointed that Tim's cock isn't as big and fulfilling as Alan's. It's a different but equally pleasurable experience. She thinks he is being a bit to shy and gentle with her and longs for Alan's rough, almost selfish fucking. "Harder Tim... fuck me harder!" Lex gasps as she thrusts her pussy onto her brother's cock.

Alan reaches around and grabs Tim's ass, partly to prevent him from falling out of the tree but mainly to encourage him to thrust harder.

Tim can't believe his luck! This is so much better than jacking off. His cock is throbbing in a way he's never known before. He looks down to watch his cock repeatedly sliding into his sister's hot cunt. There is some white slimy looking stuff coming out Lex's pussy, coating his cock, smearing his hairless crotch and dribbling onto his tight ball sack. He sees Alan stroking Lex's pussy in little circles just above where he, Tim, is fucking Lex and occasionally Alan's fingers are brushing against his cock. The effect is electric! All this stimulation is too much for Tim and he cums hard and fast. "Ah... ah... ah fuck!" He yelps.

Lex too, is cumming for the second time. Alan's finger diddling her clit and Tim's pulsing cock have worked their magic on her. "Oh my god! Oh fuck, yeah!" She gasps.

After a few minutes both kids are relaxed. Alan helps them to settle down on the branch either side of him, each of them snuggling up to him. None of them have bothered to rearrange their clothing. Alan has an arm around each of the kids, his hand falling conveniently into their naked laps. He idly fingers Lex's sopping pussy and Tim's cock, which has barely softened.

Both Lex and Tim are playing with Alan's cock which is also beginning to stiffen again. It's going to be a long night, thinks Alan... but it promises to be a pleasurable one!