Yes, It really does sound like fun.

You can't help but agree!
You don't really get all of this stuff about super-soldiers and credits, (or even what that stuff is) but what you do know is that having some babies sounds like a lot of fun!
"I will do my best, Doctor!" You say, giving her a salute.
"Great!" She stands up. "First things first, you have to get yourself cleaned up."
"The prep room is through there." She says, pointing at a door across the room. "There's a shower in there, You know how to work one of those right?" You nod. "Great. There are also some pills in there that should flush any birth-controls you're on right out of your system. Not gonna need any of that for a while. Then, the arrows on the floor should lead you into the test area."
"I've got to, uh, prep the other subject..." She leaves through a different door.

Okay.

The shower is a bit more complex than your used to. Up on Level 6, the cleaning hall only has two buttons, HOT and COLD. Often times it would shut off in the middle of your shower and you'd have to press it again. Here, you've got knobs and handles and even a separate nozzle for cleaning your insides. Nice.
Those pills the Doctor mentioned taste bitter. But they work.
All freshened up, you towel yourself off and follow the arrows to a big metal door. There's no handle so you're not sure how to...
Maybe this pad on the wall?
You poke at it and then try pressing your whole hand on it. You jump as it emits a loud buzz. The metal door slides up and you walk through it.

As the door seals shut behind you, you take in your surroundings.
This large room appears to be an attempt to recreate what the outside looks like. The room is big and spherical. The walls consist of screens playing panoramic footage of a lakeside in springtime. In the "distance" a verdant mountain looms. On one side is a "forest" of "pine trees." On the other is a "lake."
Above, the noonday "Sun" hangs in the sky. Right in front of you, under a grove of verdant trees, is a small log-cabin. That's real. You assume that the living quarters are in there.
The illusion is somewhat shattered when you see that one of the walls of the room is flush with one of the walls of the cabin. There are no screens around the edge, leaving a big concrete ring hanging in the air around it.
Despite the clear falsehood, you can't help but be enamored by this place.
You've never seen the outside, only read about it. And you've only been in a enviro-lab like this once before, years ago, for a public sex workshop. It wasn't a forest like this though. It was an office building. A place that normal citizens work at. The other subject bent you over a table and fucked you for an hour.
That time on your back, being gawked at by "normal" humans is a memory you have always treasured.

You climb the steps up to the porch and pause at what you assume is the main door. You hear terse voices inside. You peer through the window and see Dr. Gamma talking with someone else. A big someone else. A big NAKED someone else.
Oh, this just keeps getting better.
You glance around the door, looking for a pad like the last one. There isn't one, just a small button. That must be it...
-DING DONG-
Oh! Oh my!
Was that the wrong one? What does that chime mean? You must have done something wrong!
Oh. Dr. Gamma is coming towards you.
She opens the door from inside and gawks at you. "What are you ringing the doorbell for?"
"I didn't-"
"Right, right, you've got no clue what that is..." She says. "C'mon in."

You step inside the cabin. It's the nicest dang living-quarters you've ever seen.
It's big and spacious. There aren't any walls separating most of the rooms from each other. From here you can see a bedroom, a common area and a mess hall, all within one open floor plan. There is a door in the corner which you assume leads to the restroom.
Man, is this how Citizens usually live? You could get used to this.
There is someone else here.
"Hey, Kit!" Says Dr. Gamma. "What'd I say? She's perfect for you!"
Standing about a head taller than you is... A woman?
This woman is big. She looks like she could lift you over her head. She has a lot of muscles, the kind you see some male Subs get after a few trips to the exercisers. Her skin is pale, like really pale. Like sterile sheets kinda white. Her hair is shorter than yours but it's bright red.
And then you get to her-
She has a cock.
A big fat cock.
Oh my gosh.
This big muscle lady is going to put babies in you?

Best day ever.