She giggles at the end, the laugh surprisingly high-pitched even for her feminized body, and makes little gripping motions with her fingers in the air in front of her. "Mmm, tingly. Tastes delicious, too."

We should ask if we can kiss her to get a taste of it too!

No!

After she settles the basic shape, she starts kneading the glass with her hands, it moving partly with the motions of her fingers, partly with her will. Her blush intensifies as her hands stroke the glass, massaging and kneading, and before long she's sighing and breathing fast. 

We should mess with her-

No!!!

Ignoring her various impulses that should not be indulged, Phee'll continue watching Eva sculpt and try to guess what the end object will be.

Gradually, Eva works out a long, curving neck for the vase, and a heart-shaped base. 

When her fingers dip into the neck of the vase to make the gap at its center, Eva lets out a harsh breath followed by a gentle moan. "Fuck..." she swears under her breath. 

Still, she continues, working out the kneck with her fingers inside it, making it sweep just that little bit higher and come out to a fluted rim.

Pretty. Phee is now wondering if Eva would make those same noises if she slid her fingers into the vase while she was connected.

Eva keeps stroking and working the vase, rounding its curves, finishing it out. Her breath is high and shivery, and her skin is flushed with sweat. 

Finally she pinches away a final globule of waste glass, rolls it in her hands in a rough marble, and tosses the marble of deep rose-pink glass over to Phee. 

"There," she announces with a grin. "Now I should have some water."

She opens her water-bottle and tips it back, and a full half-liter of Phee's water disappears down her throat in one long series of swallows. 

Phee continues watching Eva work and resisting her impulses to mess with the adorable focused Eva, or at least touch herself.

and tosses the marble of deep rose-pink glass over to Phee. 

Phee may have done alot bit of flailing around at suddenly having a marble tossed at her, in her (successful!) attempt to catch it.

She opens her water-bottle and tips it back, and a full half-liter of Phee's water disappears down her throat in one long series of swallows. 

Phee lets out a startled and distinctly loud series of moans at the sudden and unreasonably erotic sensation of entering Eva and flowing down her throat, and again and again as she swallows down all of the Phee that had been in that bottle.

You should fuck her, or tell her to take responsibility for her actions, or at the very least take responsibility for them yourself and bring yourself the last little bit of the way to orgasming.

Phee will eventually sit up and say.

"Um I um err I just remembered that I forgot to get off I mean turn off one of the uh lights in my cave, so I'm gonna brb and turn off I mean get off I mean turn off it!" 

And then she's gonna close her eyes and attempt to plane shift to her pocket dimension.

(And fail because of how unreasonably turned on she is.)

"Alright, if you insist." There's a teasing note in Eva's voice. "If you want something all you have to do is ask, you know."

"T-thanks! A-and I do know!"

And then she'll go back to attempting to plane shift.

After several minutes of failing to leave the plane, Phee will eventually shyly admit.

"I um, kinda wanna ask if we... that is to say... I'mreallyreallyhornyandwanttoaskyoutotakersponsiblity... or I mean if could m-maybe if you'd like have s-sex? butit'dalsofeellikeabadideatoask..." Because the last time she let Horny direct things and had sex, she messed things up.

"I thought you'd never ask. Good girl!"

Eva reaches out and firmly pets Phee's hair again. 

"Thank you, honestly. I don't know if it's the food or the planar atmosphere or just my habits, but my libido's gotten significantly stronger over the last year or so and right now it's crying out that it wants you." 

She brushes some of Phee's hair away from her face.

"May I kiss you?"

"I thought you'd never ask. Good girl!"

Eva reaches out and firmly pets Phee's hair again. 

Nooo, saying it like that and petting her makes her feel like a pet.

Phee will preen at the praise and lean in and nuzzle against the pets.

"May I kiss you?"

Phee shyly smiles at Eva and blurts out a "Of course!" in response to her question without even thinking about it, and continuing her streak of not thinking, follows up with. "Youshouldfeelfreetodowhateveryouliketome!"