Locking the door of her recently acquired room within the Morning Dew Guild Hall, Katherine leaned against the wood, staring at the simple adornments provided. A bed, a nightstand, a chest to keep her stuff in -not that she needed that- and a lantern that glowed with arcane light, as steady as an LED back home. Finally, true privacy. 
With her belly full from the best meal she'd had since her arrival in Harahel, she could relax, and relaxing meant a few very important things. She set her hammer on the nightstand, in easy reach. Technically she could have kept it in her pocket plane, but it felt better to have it in sight, faster, though of course that was just in her mind. That done, and her boots kicked off, she fell into the bed.
"Okay, Niyas. You're clear."
The apron and shorts she wore were actually merged at the front, underneath the hanging apron, and now it all melted, the brown leather disguise falling away, the mass of flesh-like "fabric" now spreading across Katherine's nubile body. It soaked into the nooks and folds of her form, a second skin, tight and supple. Now it covered her entire body from the neck down, glistening in the lamplight.
"You're certainly eager." The new voice rumbled through the entire suit, the senketsu producing sound by vibrating various parts of itself. It had the added benefit of stimulating the woman it was wrapped around, and Katherine embraced the sensations against her perked nipples and erect shaft.
"I finally get to do this on an actual bed." The Okami replied, staring down at a body that was still strange to her, still not explored to the depths that she wanted. Until about a week ago, she had been someone completely different. Now, she was a denizen of Harahel, and a powerful one at that, with a body she had chosen for herself. Her ******* swelled, blocking some of her view of her light abs and eternally erect ****, all coated in the secondary lifeform she had chosen as her constant partner.
Underneath the glistening black shell of Niyas' "body", slick tendrils sprouted, causing the suit to bulge slightly around her ****, making it look even more swollen than usual as cilla massaged her shaft, milking her. She spread her legs over the bed, gripping the sides of the mattress with her calves and squeezing to hold on for dear life as the "feeding" process began.
"Ohhhh **** yes, squeeze me dry, pump me deep-"
"How long do I have?"
"Shit, uh, we're finally in a town so go for- hn- four hours?"
"You're going to need recovery time too."
"I'll just sleep it off, it's fine, now **** ME!"
"You'd almost think you were the one that needed to do this in order to live..." Niyas grumbled across Katherine's body, more cilla sprouting around her *******, and two massive tendrils growing into her waiting snatch. With the way her body worked, two tentacles twisting around each other was what she all but required to actually feel anything. It was as if she was fisting herself, a massive bulge in her gut pushing up past her ****, and then spreading out, filling her insides well past what would have been physical limits in her past life.
Suckling on her own fingers to muffle the moans, Kathy's back arched up, her shoulders pushing back into the mattress. Having both a **** and a ***** had taken some adjusting, but the intense sensations running like lightning up her spine were worth all of it and then some. 
The cilla milking her **** squeezed her shaft, a ring of increased pressure that started at the base and pulled upwards. Before one ring had reached halfway, another was forming, and the suction from the motions was everything she had ever wanted from what amounted to a very strange blowjob.
All the while, those two tendrils in her snatch began to piston, pumping in sync and flexing outwards every time they retracted, stretching her walls even further before leaving an aching emptyness that they dutifully filled once more, sending a jolt of pleasure through Kathy's body.
Under these ministrations, it was a small wonder she'd lasted even twenty seconds. Biting down on her fingers just to focus and build things up, it wasn't enough, soon she was hitting the limit and the orgasm was pounding into the base of her skull, forcing entry to her mind and sending her entire body into spasming fits.
Even while the first, powerful, hot rush of tingling pleasure wracked her flesh, a second was already building, and rapidly, as Niyas had started to suckle on the tip of Katherine's dick, extracting the massive amounts of fluid that were already gushing. A new tendril reached out, accessing the okami's hammerspace and producing a water bottle, shoving it's tip into the wolf-girl's mouth after she popped her fingers out, cutting off the half-formed scream of extasy. Had to keep up those fluids, after all. She almost choked on the sudden influx of water, but soon built into a rhythm alongside the pumping skinsuit, closing her eyes and letting the physical sensations cast her into an ocean of bliss. As the second wave began to wash over her, doubled in size and vigor compared to the first, she embraced it, clenching her thighs hard enough to leave permanent imprints on the sides of this particular matress. If Niyas had eyes, it would be rolling them, having to exert itself to adjust its owners' position, rolling her onto her side and forcing a third tendril into her snatch. The extra pressure in her ***** gave the blonde bitch something to really clamp down on, and her thighs actually stayed slightly spread afterwards, despite her constant desire to clench. 
Kathy's **** was a faucet, and the senketsu was the drain, eagerly swallowing the gallons of cum and growing stronger for it. The suit's walls thickened, a tighter cage around its prey, but that only made her writhe more, the cilla within massaging her ******* in a million different directions at once.
Another, third orgasm wracked the okami's body, doubled in strength yet again. Already, this was supposed to be more pleasure than her mind was physically capable of producing on its own, but the magic involved cared not for such limits. Speech was out of the question for Katherine at this point, and this was the core reason that they had to set time limits in-advance, else there was no way to communicate a stopping point. 
"You're lucky I'm here to defend you, and to remember to lock the damn door." Niyas' voice rumbled across the blacksmith's body again, and the tendril that was forcing water down her throat paused to flip the lock. "You really do become useless in under a minute... idiot."
Those four hours seemed to pass in seconds for Katherine, but it was a very, very long night for her companion.