"You're ready for this?"
You're Anon, and you're the test pilot for an extremely thin armor set designed to protect humans in the event of accidental collision with larger species
The relatively massive mouse had already given you a light damage test, several heavy stomps and traumatic impact tests
Even through the first day, she slipped you into her clothes for what she said was an extended trauma test, but you think she's just sweet on you
Above you looms the towering colossus of mare, who would be pushing the mandatory maximums of the suit
With a slight smile, her hoof raises over you
She was wearing boots...
You look to the mouse for reassurance just as Miranda's metal alloy combat boot comes crashing down on you like the fist of an angry god
Everything was pitch black, then the boot lifts off of you
The metallic floor you were on had cratered into the shape of Miranda's boot but by god you were alive
The mouse girl quickly snatches you up before the mare decides to stress the suit again
She's got you clasped in her paw, looking you over for injuries
"Let me see him, Daisy. We haven't done the second extended trauma test." The mare says, reaching down
She was big enough to grab the mouse easily
"I... I guess rules are rules." She says, handing you off to Miranda, who pinches you between two fingers, different from how Daisy used her whole paw
It only made you recognize the further size difference
A sudden rush of vertigo strike as the mare stands up, sliding her pants down with one hand
She then pulls down her panties and set you in them
The material is slightly damp and thoroughly reminds you of Daisy, only much more potent
You were glad that Miranda set you in the front, as the thinness of the back of her panties let you know they would be disappearing into her crack
Your world goes dark again as Miranda pulls her panties back up, and you enter both her unshaven, soaking crotch and extended heavy damage test #2

Both Miranda and Daisy enjoyed your company aboard the research vessel, mainly because of your nonchalance in dealing with the titans
You really didn't mind being picked up, being on Daisy's shoulder meant you got around faster
Miranda was second in charge under Daisy and she seemed to like you just as much
Most of the work you did was providing help with tiny machines and testing equipment for them
However earlier today was the first time you'd gotten into one of their pants
Daisy was pretty big, tucking you away between her legs with ease, soaking you throughout the duration of the light damage test, at least you knew the armor was waterproof
However, Miranda was much larger, her snatch came crashing down on you like a collapsing building
The moderately soft flesh beared down on you, spreading slightly as something from outside pressed you against Miranda's labia
Daisy, you imagined, would be a tight fit for you due to her relatively small size, but Miranda's marehood hung over you like a cave, there was an actual risk of slipping inside, which may be what she's intending since her hand has slipped into the panties with you
A single digit pushes under you and forces you in, pulling out and leaving you alone between the two damp walls
Although you aren't being crushed, moving is very difficult due to the weight on each side of you
Since you probably won't get another chance to do this, maybe, you opt for some exploration
Moving within Miranda is made almost impossible because of how hard it is to push against the walls and how they've quickly become slippery, the entire cave shivers as you begin to move
Soon after you'd began to traverse the mare's pussy, a large finger comes in and presses you into the roof of the cave
It grinds you pretty harshly into what you assume is her g-spot
Maybe this is different, alien biology and all
The caves violently quakes, Miranda's fingers tensing up before relaxing and dragging you out into the light
You're briefly adhered to Miranda's fingers by the viscous fluids of her marehood
You peel off and drop into her palm
Miranda sets you down on the ground, getting up from her seat and zipping her pants back up
"How's the suit doing?" she asks between deep breaths
Daisy checks a display on her wrist
"Still fine. How's it feel, Anon?"
The thin layer of greyish fabric has held up so far and kept the mare from crushing you, it wasn't even damp

"It's good!" you give Daisy a visible thumbs up

"Think you could go for a second round?" Miranda asks
"Damnit give him a minute to breathe, and it's my turn next!" Daisy crosses her arms

"Do I get a say in this?" you ask

"Of course," Daisy replies, "What's your say in this?"
The two giants look and wait for your response because they saw you as an equal, an equal that would fit inside them but an equal no less