A giant blowjob!

You say: "Coincidentally, I do have something in mind. I'll lay on the couch, and you can try giving me a blowjob."

Alexandra's eyes widen and she looks at you with interest, saying "Huh, I've never given anyone oral before. I hope I'll do a good job!"

You lay down on the couch and unzip the fly of your jumpsuit. Alexandra gets down on her knees by the couch, so that her head can be closer to your crotch.

She takes your cock in her giant hands and giggles to herself. "Wow, this is so tiny! It's kind of cute too."

You ignore her remark and just watch her movements. Watching her fit body has already made you hard. Alexandra wraps her hand around your member, covering it completely. She starts to jerk it up and down, but her size and strength pull your hips along the way.

"Woah Woah, slow down! How about just using your mouth?" You reply, afraid she might rip your dick off entirely if this were to continue.

Alexandra says "Alright!" and lets go of your cock.

She licks her lips and stares up at you, seductively. She moves down with her mouth open and her tongue sticking out. Her wet tongue makes contact with the tip of your dick and her saliva drips down to the base of your shaft, coating your cock in her warm spit. She moves her tongue down to your balls and licks upward to the base. Her tongue feels warm and soft, but rough enough to move the skin around your dick move with it. After licking you from bottom to top a few times, Alexandra turns her attention to the tip of your cock, licking off any precum on it and stimulating you quite a bit.

"I really like how your little guy tastes..." She softly says, only briefly stopping her tongue movements.

For a first-timer, she actually seems really experienced!

After licking your junk from head to toe, Alexandra finally puts the rest of her mouth to work. Her lips envelop your cock in one fell swoop, swallowing you whole. Sadly, you don't even feel the back of her throat, as her mouth is simply just too big. But it honestly doesn't matter, because the warmth of her mouth and the movements of her tongue are just enough to flood your mind with feelings of pleasure. Her serpent-like tongue wraps itself around your dick and she starts bobbing her head up and down.

After a while of this, you already feel your orgasm building up, however, either by chance or instinct, Alexandra quickly pops her mouth away from your cock.

You can't help but speak up. "Wow, you're really good at this. Are you sure this is your first time?"

Alexandra smiles at you and says "Yeah. Am I doing a good job? Let me keep going then!"

You don't protest and watch patiently to see what Alexandra's next move is. She moves her right hand's index finger up to her mouth and starts slobbering over it. You are a bit weirded out at first, but the shocking realization makes your eyes go wide and your whole body tense up. She moves her finger up to your tight asshole and presses on it, popping it inside with ease. The size of her finger is that of your own dick, and she starts pumping it and out of your anus. She quickly plants her mouth around your cock again and continues sucking you off like before while stimulating your ass with her finger. She holds her finger slightly hooked upwards so that it presses against your prostate.

After a few more minutes of getting head from this giant futa, your orgasm is right around the corner. You start panting, clenching your fists and curl your toes to last as long as you can, but Alexandra doesn't seem to be giving you a chance. She keeps her pace and even starts applying some suction to your cock, making it even more stimulated. You start slightly bucking your hips and your mind starts losing track of everything around you as you finally experience an orgasm!

Alexandra doesn't stop what she's doing for one second and waits for your cum. You feel your cum travel through you and shoot out from the tip of your cock straight down Alexandra's mouth. She instantly swallows your load and keeps stimulating you, sucking you dry of everything you've got. Her greedy mouth swallows up load after load of your sperm until you're dry. Even after your orgasm has ended, she still sucks on your sensitive dick, making you flail around in post-orgasm sensitivity. Finally, she lets go of your dick and it flops down on your stomach. She exhales as if just having finished a tasty beverage and licks her lips.

She says: "Wow, that was pretty tasty! Hope you enjoyed it."

You take a few breaths and reply "It was amazing! Thank's for that, Alexandra!"

She smiles back and says "No problem! BUT, there still is one more thing you're forgetting... The test doesn't end until I cum, so how about you repay me real quick?"

Your eyes are drawn to her cock and you instantly start worrying. Giving you head has made her fully erect, her giant monster cock throbbing and dripping with precum. You watch as it rhythmically pulses and gulp at the sight.

"Don't worry, I won't make you deep throat it or anything," Alexandra says, seeing your worried expression "Just suck on it while I jack off in your mouth, OK?"

Before you even respond, Alexandra has already hopped on top of you on the couch, her cock head pointing inches from your face. She scoots closer and you open your mouth, welcoming in her dick. Her tip slides in your mouth and you close your lips around it. You get a good taste of Alexandra's precum as your tongue explores every crevice of her tip.

"Oh... just like that..." You overhear Alexandra say under her breath.

She grabs her dick with both of her hands and starts jerking. You just lay there, slobber all over her and await her cum.

She starts stroking harder and faster, getting closer and closer to cumming. You wait patiently for her cum and just look up at her bouncing breasts and pretty face. She starts panting more and more and you can feel her tip become more tender and hot.

"HnnnngghhhhAAAAHHH!!!" A loud scream fills the room and Alexandra finally cums.

She pumps a giant load of seed in your mouth and you are taken back by its size. You instantly start swallowing and tasting its distinct taste. Another load quickly follows the first one, even before you are done swallowing it. You try to make up for time and chug as much as you can. Her jizz starts flowing out too fast, and it starts leaking from your mouth. Alexandra pays little attention to this, as she is busy stroking her dick with incredible speed, getting as much as possible from her orgasm. A minute of nonstop cumming passes and you've already given up swallowing her cum. You let it pour all over your upper body and down on to the floor. As the final pumps of seed exit her shaft, her orgasm finally ends. She pulls her cock out of your mouth and you take a breath of fresh air through your semen covered lips.

Through tired breath, Alexandra says "Ok, now we're even." and forms a tired smile on her face.

She gets off of you and lays down on the floor to rest.

The speakers boom and Alan speaks up. "Well, this was one interesting test... Either way, we got our results, so your job is all done! When you're ready, move back to your rooms and let's continue the day."

You notice that Alexandra is already taking a nap, so you decide to do the same in the comfort of your own room. You walk over to your door, feeling a bit full, and step inside.

You got the "Give and receive" ending with Alexandra.