Alexandra's friend... (Another combat model)

You see two hands poking out from under the door, and you hear some grunting sounds as if someone is struggling from the other side. Then, with one swift motion, the door flies open and you stare wide-eyed at what's standing in the doorway. It's another combat model, standing 11.4 feet tall, same as Alexandra. She's just as well built as Alexandra too, but her body is covered with some sort of uniform, kinda like the one you saw in the green room. The only thing really stands out as different between the two of them, is that her hair is blonde and cut short.

She speaks with a somewhat high voice: "What the hell is going on Al? I heard the commotion in the hallway and..."

She then finally notices you and Alexandra in the bed together, with her cock buried in your ass.

Alexandra says: "You won't believe what I got Mal! Say hello to my new personal fucktoy!"

You guess that these two are friends. The blonde one's name seems to be Mal, and you watch as she comes in deeper into the room, letting the door drop behind her.

She speaks up again. "Sooo, do you mind if I join in on the fun?"

Alexandra responds "Not at all. Here, come help yourself in his ass. I've already fucked it enough and I wanna try out his little mouth as well."

Just as she finishes speaking, she begins sliding her dick out of your ass and Mal starts undressing. You watch as the clothes fall off of her body elegantly, as her toned and fair skinned body is revealed to you. Your eyes are instantly drawn to her crotch, as you spot her giant package. It's already starting to get erect, slowly growing to the same size as Alexandra's. Then, Alexandra walks around the bed and pulls you closer to the edge, so that your head hangs off it. You can already feel big footsteps make their way over to your exposed ass. You shiver in excitement as you're about to get fucked by TWO giant cocks at once!

"Open wide!" Alexandra teases you.

Your mouth shoots open and your tongue rolls out the bottom of your mouth as you await her wondrous cock. Alexandra guides her tip inside your open mouth and you can already taste her sweet precum. You allow her hard shaft to slide deeper and deeper in your awaiting mouth. A giant bulge starts forming on your throat, letting Alexandra see her progress, as she delves deeper inside of you. Naturally, you start gagging and **** around her cock, but that doesn't stop her. At this point, it seems that Mal is done getting ready to get her fill of fucking you and starts sliding her own dick inside your ass. She feels slightly thicker than Alexandra, as you feel her stretch your asshole and rectum even wider than it was before. You flinch and try to moan, but you are unable to, as Alexandra's dick is plugging your throat. You feel your feelings of pleasure grow larger, as you slowly get spit roasted by the two giant dickgirls.

Mal's cock slides all the way down your ass and you feel her heavy balls slap against your butt.

"Wow! His ass is already so screwed, that my cock just got sucked right in. This is going to be fun!" she says.

Alexandra quickly pumps her hips forward, letting her two-foot monster slide balls deep in your throat. Your eyes bulge wide and spit flies out of your mouth and nose as you **** around her massive cock.

Mal then says, excitedly "Woah! I can feel your cock inside his body. Try thrusting again!"

Quickly, Alexandra brings her cock halfway out of your stretched throat and thrusts it back inside forcefully, letting her giant balls smack on your face.

Mal starts giggling to herself and says "Hehe, I really CAN feel your cock. Hold up, let me try it too..."

She pulls out of your ass until just her tip is left inside, before thrusting back inside balls deep. The rush of having a dick slide back inside of you so quickly sends shivers down your spine.

Alexandra speaks up "Oh wow, you're right! I can feel you too! But enough games, let's get to action..."

They both start pulling their giant cocks out of your body and get ready to fuck your brains out. They pull back a comfortable amount and simultaneously thrust back inside of your holes. Your whole body vibrates and shakes from the sensation. You feel completely impaled, trough and trough, by futa cock. You feel both of the girls cocks all throughout your body. You are nothing more than a double-ended sex doll, and that's all you ever want to be. The girls start pumping in and out of you, gaining a steady rhythm and frotting their dick together inside your guts with every thrust. Giant bulges form on your stomach and throat, as they get filled by their massive cocks, joining at the middle of your torso. The girls start moaning and thrusting you faster and faster, pushing your body to its very limits. You can't breathe properly from Alexandra's cock clogging your throat and your insides get squished and pummeled by Mal's dick. Your prostate, however, has never felt better and you cum multiple times during your session, but the feeling of being fucked is way more overwhelming than the actual orgasm.

Time moves at a seemingly fast pace, as your thoughts (and body) are filled with nothing but the giant dicks of both Alexandra and Mal. They fuck you incessantly, not making much time for rest. Your anus and throat get fucked to be perfect molds for each of their dicks. You start feeling dependent on them as if you NEED their cocks inside of you to stay alive. Slowly, you start noticing that their speed starts increasing. Faster and faster, your body gets pumped by girl cock, and you feel them start twitching. You can't imagine how much cum is stored in BOTH of these girls, but thinking of all of it flowing inside of you gets you crazily horny. You use the last of your strength to make sure you get every last drop of their sweet nectar. You wrap your hands around Alexandra's waist to bring her in even closer, and you cross your legs around Mal's hips, pushing her further into you. A tide is coming...

You hear a loud scream come from both Alexandra and Mal, as they finally cum. You feel the cocks in your throat and ass throb and twitch as their seed travels up from their balls and gets deposited straight inside of you. Their dicks tense up and an absolutely titanic combined load of cum fills you up. Your stomach instantly starts expanding up to double the size it was earlier, from the sheer amount of thick jizz embedded in it. More and more of it pumps inside of you and once your stomach expands to an inhuman size, the cum has nowhere else to go but out. A high-pressure stream of cum starts shooting from your mouth and anus, getting all over your face, ass, body and the bodies of the girls. The wall and ceiling also manage to get splattered by cum, and it slowly starts collecting on the floor.

You can't tell how much time passes, but Alexandra and Mal seem to finally be done. It's easy to say that everything in the room is covered in a white, hot and thick slime with a strong smell. Any possible part from your mouth to your asshole is now filled with cum, not to mention your stomach. It's expanded to the size of the rest of your body, as the semen of the girls kept pumping into it. The floor has collected a layer of white sludge and the cum dripping from the ceiling can be heard as it splashes down into the pools of cum on the floor. The girls pull out their cum covered cocks out of your holes and slump down to the floor, each dazing off to sleep. Your body takes some time to adjust back to its normal functions, as being a fuckable doll ISN't one of them anymore. Your ass and mouth start practically blasting out cum as it escapes from your stomach.

Once you clear your stomach of semen, another couple of inches of cum gather on the floor. You lay on the bed, motionless and still in shock after what you just went through. You were so taken back by everything, that you didn't even notice the two guards standing by the now opened door.

One of the guards speaks up in a low, raspy voice. "Well then, that sure was a show. I'm sorry we didn't interrupt earlier, but it was a huge safety risk for both us and yourself. No one wants to mess with sex-crazed combat models..."

The other guard chimes in with a higher, younger voice. "Yeah, and seeing how they were going at you, we had a feeling they would tire themselves out after their orgasms. So hey, no hard feelings! Let's get you out of here and back to your room!"

You follow the two guards back through the testing room and back to your room. You say goodbye and take a good opportunity to wash and get some rest.

As you lay in bed, the speaker in your room turns on, and on the other side, is Alan. "Hey there, tough guy. I'm really sorry that things got so out of hand, but I guess that's on the other teams, not us. Still, we did get some valuable research info, so it wasn't a complete bust. We'll definitely work on combat models, to make sure something like this was a one-time thing. Also, expect some bonus pay for the troubles. But anyway, it's probably best that you get some rest and prepare for some more tests afterward. See ya!"

You finally take your well-deserved nap.

You got the "Attack of titans" ending with Alexandra.