Title: Ad Infinitum – Prologue
Author: Alice J. Foster
E-mail: Summary: Alexandria Jackson is bored so she decides to visit her best friend, Jacob O'Neill to see his latest project.

Category: Action/Adventure, Alternate Universe, Angst, Future Story, POV, Romance, Other

Season: Spoilers up to season 10. Vala is part of the SGC and Jack is stationed in D.C. Oh brief mentions of Adria and The Pegasus Project.

Episode related: Direct mentions of Pilot, Emancipation, Brocca Divide, Brief Candle, Torment of Tantalus, Hathor, Past and Present, and every episode where Ancients were mentioned.

Pairing(s): Sam/Jack, Daniel/Vala

Story Rating: R/NC-17 (I'll let you know where the smut is and you can skip that part without losing major points in the story if you are not old enough or not inclined to read adult fiction)

Chapter Rating: PG-13 (minor language and innuendo)

Archiving: My LJ (http://shipperfey. my website (http://obsessionscorner. SJD – yes, SJAdult – yes, Heliopolis 2, Gateworld (PG-13 version). Anyone else who wants it, please go for it, just drop me a line so I can visit it :)

Feedback: Please, you will make my day. Constructive criticism appreciated as well.

Warnings: graphic sex, sexual situations, language, sex, minor character death (mentioned but not described or thoroughly discussed).

A/N I: I tried to make this story as historically accurate as possible. However, I've never been to modern or ancient Alexandria, so if you find any inaccuracies, please let me know so I can try to fix them.

A/N II: This fic assumes that Jack and Sam got married sometime during her assignment to Area 51 but they kept it a secret. This fic also assumes an established relationship with no definite status between Daniel and Vala and that Vala lost Adria sometime between Season 10 and the time Alex was born.

A/N III: Thank you to my beta Tricia :).

A/N IV: This fanfic has original characters - two play a major role and two play minor roles. Rest assured, however, that this is 100 Mary Sue-free.

Disclaimer: Not mine because if they were, this would be an actual episode... directed by Peter DeLuise who rocks my socks.

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Alex's POV

I had been trying in vain to ignore the ever-increasing volume of the discussion going on downstairs. I really, really hate the fucking air ducts in my house. I could hear my mom's voice loud with indignation then my dad's voice following with some deep sense of resolution. The shitty air ducts left me out of the current topic of discussion, thank god for small miracles. Hell, who knows, it could be about their past or it could be about which laundry detergent to use. They argue about everything and I am not joking. Last week they got into an argument about grocery coupons, the week before that about the archaeological dig in PX9-873

The loud shattering noise startled me and then silence followed... oh.

Ew. Yeah, arguing is like foreplay to my parents, except that they're not ashamed to do it in public and especially not afraid to do it knowing I'm a couple hundred of feet away.

I rolled my eyes in disgust, "oh come on. Why do I have to have the belligerent horndog parents?"

Knowing what's sure to follow, I got up from my bed and ran into my adjacent bathroom, throwing my glasses on the counter and reaching for my contacts. I stole a glance at my hair, the jet black mane completely out of control and decided to just put it in a ponytail instead of wasting time brushing it. My nightshirt landed somewhere near my toilet as I quickly slipped into my black leather pants and my broken-in black tank top. My Docs were next and I didn't even lace them up all the way, I just tried to get to my window as fast as I could as I heard the sound of a body slamming into the kitchen wall downstairs.

With the ease of years of practice, I slid down my slanted roof, gracefully and effortlessly landing on my front lawn. I didn't start running away when I was twelve without learning a thing or two.

I glanced around the street, which looked calm and empty as I pulled my wrist up to eye level, slowly tracing the alien script on the bracelet that's like my second skin. The black and gold artifact glowed for a second or two as it tried to establish a link, then the small holographic screen appeared and I waited for the well known tanned face and blond hair to appear.

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Jacob's POV

The garage was dark, the only light source being the flashlight I was holding, so when my bracelet glowed from the stool I left it on, I quickly reached for it. The sight that greeted me via hologram was the very familiar face of my best friend, hair pulled back in a ponytail and brown eyes looking frustrated and bored.

"Let me guess, you escaped the confines of your loathsome, oh-so comfortable bed again and now you're bored."

"Worse. Parents were getting loud again," she explained with a pout.

I rolled my blue eyes at her, "Oh poor Alex, her parents can't keep their hands off each other. At least your parents aren't eligible for senior discount yet."

Alex laughed but she knew I didn't really mean it; I worship the air that my parents breathe, I am incredibly proud of both of them. Of course, that's not to say I share everything with them - my current project was definitely not on a need-to-know basis for them as far as I was concerned.

"Did you finish working on the bike?" Alex finally asked me, her partner-in-crime. The movement on the screen suggested that she was walking, most likely on her way here, her seemingly permanent haven whenever she ran away.

"Trying. If you're intent on coming here, I should be done soon then we can go for a ride."

"Jacob Benjamin Carter! Are you actually talking about stealing your mother's bike and taking it for a joyride after some less-than-Earthly modifications? Since when did you become the rebel in our duo?"

I laughed because I knew she was having a field day with my little disobedience. "Well, it so happens that my mom is in Washington and my dad did promise to give me a vehicle for my 18th birthday… this poor bike has been sitting here for ten years; I figure I'd take it after a few modifications of course."

"Your birthday is not for another nine months! And you just decided to use Ancient technology on a whim? Tell me, what did you do to that motorcycle anyway?"

I sighed. You see, what she was trying to do here is something I'm quite familiar with. She'll ask questions about how something works or what I'm doing, then I'll start to explain and she'll roll her eyes at my techno-babble. So I tried to make it as simple as possible, "I wanted it to go faster, ok? I helped Mom fix the power core on that Asgard ship that crashed in P6A-804, so I just recreated that to a smaller scale."

"It's not gooonnnaaa woooork." The holographic image sing-songed to me. "Plus Thor will be pissed when he finds out you're using Ancient technology from an Asgard ship without authorization.""First of all, Thor likes me better than you plus he won't find out. Second, I'm the one with the Ancient gene to work those devices. And you're the one who stole these bracelets from the lunar cave in M21-473, so don't talk to me about breaking the rules, Miss Rebel."

"I didn't 'steal' them. They're artifacts." She smirked. "We're studying their purpose."

"If your parents knew—actually your mom would probably be proud. Or maybe she'd be disappointed you haven't tried selling these yet."

"They're much more valuable this way. I can bug you night and day."

"You don't need the bracelets for that, Alex. You're already a pain in my ass." I saw her eyes glowing with laughter but she still attempted to frown on the screen.

"Well let's see who's gonna comfort you when your bike sends you to Andromeda Galaxy and back, Flyboy."

"Don't be silly, I can't go to another galaxy. I didn't install a ZPM, smart-ass. And it's not going to send me anywhere, it's just going to go really fast…." I trailed off on purpose, looking away from the holographic screen.

"And….?" Alex inquired knowing there was something that I was hiding.

"… and I might have included some cloaking technology…"

"Jacob! You're soooo dead."

"Shut up and get your ass here," then I shut off the communication device.

Three minutes later I heard a knock on the garage door. The side door to the garage opened as Alex let herself in. I looked down at myself; my blue jeans and white t-shirt were a nice contrast to her outfit. Sometimes I wondered how the hell we'd ended up best friends.

Wiping my greasy hands on a rag, I took her to my new ride.

"Isn't it sweet?" I knew I was beaming and my dimples were probably visible but I couldn't bring myself to care.

"Your Mom is really going to kill you," she teased, "but you're right, it looks awesome."

We sat in a comfortable silence as I finished the last adjustments.

We'd been best friends from the moment we'd met. I was two and I remember my parents taking me to the SGC infirmary, telling me we were going to meet Uncle Daniel's new baby. I don't remember the actual first encounter but my parents said I asked to be next to the baby and I just gazed at her for hours, refusing to leave the infirmary.

Our differences went way beyond fashion choices; we couldn't be more different. Alex is extremely fond of getting herself into trouble at all times, rarely following the rules; I am a military brat - I followed the rules, I got up early in the morning, I made my bed and did my chores and I grew up constantly being juggled between cities, except in my case, instead of moving to different bases all over the world lie most kids in the military, I shared my time between Washington D.C. and Colorado Springs. Of course, all military upbringing aside, I still have some of the O'Neill rebellious streak, which combined with my mother's intelligence and my best friend's "support" meant final results such as the bike I find myself fixing.

Our families' lives could not have been any more different either. I was carefully planned, born when my parents thought it was their last chance to have a family together. My father was no longer in command of SG-1 or the SGC, my mother was co-commander of SG-1 and everything was carefully timed. I was born via c-section, between my mother's mission to P7E-495 and one of my father's addresses to the Appropriations Committee on the importance of the Stargate project. Although my parents decided that they were happy with one child, when I was ten, SG-1 found two orphan toddlers in a village that had been destroyed and after the two had been cleared by the doctors on base, Mom offered to foster them until adoptive parents could be found. Like Cassandra, Olin and Jaen - my brother and sister, respectively, ended up never leaving their temporary home. Ultimately, my dad retired as a Major General, deciding to stay home with his three kids, stating he was too old for Washington politics but he was never too old to drive children to hockey or band practice.

Alexandria, however, was not planned or discussed. The timing could not have been worse and her mother had refused to give up active duty until, according to her own words "she felt a head coming out." The end result was that SG-1's GDO had been damaged in battle, her mother had gone into labor and her father had to put his midwifery knowledge to test for the third time, earning Alex the nickname Alien Girl. The family had to go gate-hoping three times until they were able to find the Tok'ra to borrow their GDO for a minute or two; that meant that Alex had been disintegrated and reintegrated about four times during the first 24 hours of her life. Her parents seemed to have avoided other "accidents" because she remained an only child. Unlike my parents, who seemed to only argue when discussing different perspectives on alien threats and how to deal with them, her parents argued 24/7, from what to serve for dinner to where their next mission should be. The final outcome, unfortunately, seemed to be a lot of face-sucking and behavior that should be discouraged in anyone over 25, to everyone's dismay.

Of course, she and I have several things in common: a silent understanding and bond between us that we can't share with anyone else our age. Both of us practically grew up on the most secretive base on Earth; we also shared a common trait: I'm able to operate Ancient technology and both of us also have naquadah quantities in our blood due to our mothers' pasts as hosts.

I grew up in my mother's lab, the Prometheus III, the Odyssey I and II, the Carpathia, the Achilles and lately the X-305s and 307s, grasping concepts early on and reproducing them in my own work. I built my first naquadah reactor when I was 12. My first science fair project had to be classified and I got my one and only B in a class because I was unable to present it to my classmates, but at least it was patented and I still get fat checks for it from the DoD. Alex, in turn, spent a lot of time in digs and in dirty cargo ships. She speaks over twenty languages, eight of them fluently and she can read and write Ancient better than her own father. We spent our summer vacation on Atlantis the year before I started high school and we both go on reconnaissance missions with SG-6 or SG-22 whenever our parents let us.

More sadly, we also had in common that we both had parents that experienced the loss of a child before having us; our knowledge of Charlie and Adria only served to solidify our friendship even more. And the lack of grandparents or uncles and aunts (no my Uncle Mark doesn't count because I never see the guy) meant that the SGC and several aliens made up our surrogate family.

I realized with some sadness that this would probably be our last summer together at least for a couple of years. Soon I'd be leaving the SGC and Alex behind.

"When do you leave for the Academy?" She asked me when I finally put down my tools.

Sometimes I seriously wondered if she had mind-reading abilities and never told me. "First week of August. Six weeks of Basic Cadet training before classes start in September."

I could see her doing some math on her head, finally realizing that we only had a little over three weeks left. She softly sighed. "Why did you have to be Mr. Smart and graduate high school one year early?"

I smirked because that was so Alex, laying blame on the most inconsequential things ever. "Well you could probably graduate early too if you stopped cutting class."

Alex shrugged. "Even if I did, I still wouldn't graduate for another 2 years. Perhaps you should rethink this whole Air Force Academy thing..."

"Come on, Alex, you know as well as I do that if I want to pilot the Achilles someday, I need to become an Air Force Pilot first. They would never allow a civilian to command an Earth spaceship." It's not entirely true. Throughout the history of interstellar ship travel, one or two civilians have been appointed to command spaceships but being an Air Force officer would greatly improve my chances. Not only that, joining the military is my way of honoring my parents and their love for the Air Force.

"Does it have to be an Earth spaceship?" Alex said from where she sat on the cold garage ground, mischief written all over her face. "Because my mom knows a guy in that could get you an al'kesh for just a tiny tiny tiny amount of naquadria…. Ok and maybe a reactor or two. But that'd be a piece of cake for you."

"You know, as much of an appeal that commanding a stolen ship may hold, I think I'll pass."

"Hey who says it's stolen?"

I raised an eyebrow. "I know you and I know your mom, ok?"

Alex sighed. "Well you have no problem with riding a stolen motorcycle, buddy."

"I like to think of this motorcycle more like an inheritance, part of the Carter legacy if I may."

Alex chuckled. "Whatever, Rulebook Boy. Isn't your mom due back from Washington any minute?"

I shook my head. "No she'll be back next weekend for my parents' anniversary… Cassie is flying in too. She's staying until the end of the month then she's going back to the Academy with me; she's accepted to teach that biochem class and she has the unfortunate task of recruiting ten new students for the SGC next year. She keeps saying she didn't go to med school to babysit kids but my Mom convinced her that the program needs new blood so she's helping out."

"At least you'll have your big sis there with you." Alex said with a grin. "I won't be there to keep you out of trouble, you know…"

"More like get me in trouble, Miss Jackson."

She laughed. "That too."

"How about you shut up and help me get this baby on the road quietly before my dad wakes up?"

I ran into the house, quickly ran into the kids' bedroom and made sure they were sleeping and then past my sleeping father on the couch (he would always fall asleep on the couch when Mom was out of town). Undetected, I reached into the living room closet, grabbing my mother's black leather jacket for Alex and my Dad's brown one for myself since I know that the wind would be chilly even for a Colorado summer once we started going fast. And trust me, I intended to go really fast.

Clad in the leather jackets, we quietly moved the bike onto the street in front of the O'Neill household (or Carter-O'Neill for those anally retentive about those things) and took the motorcycle until the end of the street where I mounted it and got it started, Alex soon joining me, arms tightly holding my waist.

"I think I have an idea of where we should test the little mods I put in her." I said with a grin.

Cheyenne Mountain was only a few minutes away.