Continuing the fucking of Pia's tight pussy with her fingers Iseria slowly pushed the tip of her tail into Pia's tight ass. Slowly moving her tail inwards she began speeding up to the point where it was in time with the fingers fucking Pia's soaked cunt.

"Nnnnn..oh....no...too...tight..no..oh.. AHHHHHHHH-Yess!"
Pia's tight asshole offered almost too much resistance at first, but it still yielded to the onslaught of the persistent tail. The unfamilliar feeling made Pia come even before Iseria had reached the top pace. The intensity of her climax increased along with the faster pace, pushing Pia on to newer peaks of pleasure.
"Oh God! Oh God! Oh take me! Yes! Ohhhhh..".
The girl was clinging to Iseria for her dear life, unthinkingly digging her nails into Iserias flesh.

Pounding into her with her tail and fingers now she increased the speed loving the moans of the tight bodied little girl as she was fucked by the expert succubus. Using her power of magma she began to form a large dildo with her free hand removing her fingers as it finished forming, now placing the tip at the entrance to her wet sex. "Ready for some more fun?" Iseria asked the girl as she slowly pushed the thick member into Pia's gushing cunt.

Still in the throes of her last orgasm, Pia did not react to Iseria's words at first. She was feeling a pleasantly tired, not being used to such a sexual endurance trial.
"Mmm, warm! What is that?", Pia murmured as the dildo touched her lips.
"AHHH-AHHH! H-H-HOT!", she exclaimed as she felt it bury itself in her soft folds.

(OOC: I'm assuming the magma is hot enough to for Pia to feel it, but not hot enough to cause permanent damage. Is that correct?)

"Oh you will get used to it since I'm not done with you yet." Iseria laughed thrusting the dildo deep inside Pia in time with the thrusts of her tail into Pia's tight ass.

The artificial member was so hot, it probably would have caused Pia more pain under normal circumstances, but luckily, her brain was still swimming in happy endorphines from her previous orgasm.
Still, the reaming was taking its toll. "Please -OHHHH- be gentle -AHHHH- with -OHH- me. AHH-Ah-AH will do anything..".

Slowing the fucking down somewhat Iseria slowly thrusted the tail and the dildo, now cooled by Pia's gushing cunt, into her each thrust running over the walls of both of her tight holes.

"Mmm.. thank you..".
Rolling over to one side, Pia returned to Iseria's pussy. Digging into the demoness fold with her little tongue, Pia savored the taste of the nectar. Sticking her tongue as far out she could, she started thrusting it into the tight cunt, using it as a small member.

"Aaah, Good girl." Iseria moaned, slowly thrusting into both holes as Pia attacked her folds with her small tongue tasting her demonic nectar as she began thrusting the tongue inward, fucking the soft folds with her tongue.

Pia made a few mewling noises of pleasure as the temperature of her pussy slowly dropped. It may be that the magma dildo was somewhat malleable, but to Pia it seemed to fit her cunt perfectly.
Feeling braver from Iseria's praise, Pia briefly stopped thrusting with her tongue, putting one finger into her mouth to make it wet with her spittle. Returning her mouth to Iseria's delicious cunt, she put one finger at the opening of the succubus' ass. Making small, circular movements, she started to slowly ease it into the anal opening.

"Aaaaah" Iseria moaned as the finger slipped into her tight ass while the tongue fucked her soaked folds. Increasing the speed of the fucking of both Pia's holes, pushing the dildo deeper inside Pia's tight pussy, and enjoying the tightness of her ass as it squeezed her long tail.

Every muscle in Pia tensed from the increased pace of the reaming her opening were subjected to. She thrust her hips back and forth, maybe to escape the onslaught or to increase the pleasure, possibly both.

She let another of her fingers follow the first into Iseria's tight hole. Then she brought her other hand around the demon-lady's firm rear, and started to push her other middle finger in with the other two, seeking to fill the other woman as well as she filled Pia.

"Aaa...Aaaah" Iseria moaned as the fingers slipped into her tight ass enjoying the many digits pumping in and out of her as the tongue worked her gushing folds. While her body was worked by Pia she continued pushing her tail and the powerful dildo deeper into the girl's tight holes.

Pia was driven into a state of near animal frenzy, unable to think about anything than sex.
The normally demure and mild mannered girl was grunting and snarling between Iseria's legs. She ground her face into Iseria's cunt, lapping and sucking at her clit.
Unthinking, the clasped her tight around the head of the demoness, bracing herself for the approach of another climax.

"Aaah, Aaah, Damn girl you are really good at this." Iseria moaned as she plunged her tail and the dildo deeper into Pia as Pia attacked her cunt grinding her face against the sopping entrance.