Nicky laughs loudly as Sara drops down to a sitting position with a massive THUD, eyes fixated on you shrinking. "I wonder if it's ever gonna be small enough to make you happy, babe," Nicky says, wrapping her arms around Sara's neck and pressing her breasts into the back of her head.
"The nice thing about the potion is we'll always be able to see it and hear it, no matter how small it gets," Sara says. Kicking her shoes off, she pulls her legs in a circle until a wall of long, striped thighs surrounds you, Sara leaning forward to watch you dwindle just above the level of the carpet fibers.
"I-I'm sorry," you say, trying not to lose your focus on your words as two huge goddesses loom larger and larger over you. "B-But... 'it'?"
"Yeah, 'it'," Sara says, grinning. "You're a thing. A toy. You're basically an extension of my will, you know? Even a word like 'slave' doesn't really cover just how much power we have over you. A slave can resist. You can't."
"Y-Yeah but I'm... you know, you can call me 'he'," you sputter, trying to ignore the way Nicky is stalking past Sara, leaning over her thigh-highs, her huge breasts now occupying your entire view as you begin to disappear into the carpet.
"No, we're not going to be doing that," Nicky says, shaking her head.
"You've gotta get over the gender thing anyway, toy, it's a bad look!" Sara laughs. "Here, watch this. Bigger boobs."
Immediately your chest explodes outwards, full and firm--maybe not quite as big as Sara's or Nicky's, but impressive nonetheless.
"Mmmm, nice," Sara says, one eye looming over your dwindling body. "Why don't you femme up a little more for us, plaything? It'd be easier to look at you that way."
As you shrink lower than the carpet fibers, your body shifts shape as well, hips widening, legs lengthening, hairy skin becoming smooth and soft. You gasp, running your hands over your new, more feminine body. Meanwhile, Nicky places her nails into the carpet, spreading the strands slightly so she can see you.
"Oh, it's much, much cuter now," she says. "And juuuuuust about invisible to the naked eye. I mean, not to our naked eye, because again, can't stress this enough, literal goddesses. But a normal person can still barely see you."
"Okay, okay, that's enough then," Sara says. "You're small enough. For now."
Immediately your shrinking stops, and you take stock of where you are and what you see. Sara's fingernails are nearby, and, shaking, you realize you're smaller than the thickness of a nail. The thatched surface holding the carpet together is like a wide bridge to you, the carpet fibers as high as jungle trees. Your body is all-new, your sense of self is all but gone, and you're now the size of a dot, lost in the carpet fibers of two immense, all-powerful lesbians.