Sanura Cunnilingus with Magical Dildos
Applying fixes listed in chronicles, also switching British to American, applying the parser, and a few little edits to have less repetition.
I don't know what the original author intended the button be, but it should be clear you're getting PLOWED in the ass. I suppose I'll suggest [Arcane Toying] with tooltip "Eat her out while she fills your ass."
/[Sanura cunnilingus with magical dildos and delayed orgasm, transformed pussy juice]
/[you need any kind of genitalia]

Sanura lies on her back against a cracked block of sandstone. As the sphinx waves her hand invitingly, you begin to slowly [if (isnaked) {saunter over|shed your [armor], exposing more [skinfurscales], until entirely nude}]. She looks at you and then down at her crotch while licking her lips. [if (player failed to answer the riddle) {[say:I hope you get my suggestion,]|[say:I'm yours for the taking,]}] she says with a playful tone.

She gives you an encouraging look as you lean over her pussy. Upon giving her vulva an exploratory lick, you taste something weird--a sort of vanilla and fig combination. [say:Surprised? You should not be. As you probably already know, I can bend reality to my whim.] Her gaze urges you to resume. Your [tongue] probes her pleasant pussy, digging slowly through her labia and lapping up more and more of her flavored fluids. After a while, you start to give some attention to her clit, but she still does not seem satisfied with your efforts.

[say:Looks like you need some encouragement...] she says with a smirk. Her fingers begin moving, drawing blue lines of magic in the air. Finished with her spell, she grabs your head and buries it in her crotch. As her sex engulfs your vision, you feel something probing your [asshole]; a spectral object pushes itself inside, sending shocks of pleasure through your body. You are already about to cum, but before you can, you begin to feel magic enveloping your crotch. [say:I can't let you finish first. Just ensuring you are properly motivated,] she says seductively.

With an ethereal cock thrusting into your anus and your [genitals] firmly in her magical grasp, the heat of the moment overtakes you and you attack her pussy with newfound enthusiasm. Your tongue slathers her nethers while your whole body rocks back and forth, grinding your face against the sphinx's wet sex. Your invigorated efforts seem to meet her high standards, and Sanura lets out a quiet moan.

Suddenly, you feel more magic in the air. You raise your eyes, only to see another arcane phallus forming above you before drifting toward your [butt]. You squirm a little as the second magical rod pushes inside. A whimpering moan of pleasure begins to escape your lips as the dildos stretch your ass, only to be cut short when your face is, again, buried deeply in Sanura's pussy.

As your ass stretches ever wider, you intensify your efforts to reach release. You can sense that the sphinx is also getting closer; your prediction is confirmed when she breaks the silence with a loud moan and grinds her pussy on your face even faster. The dildos work in tandem, sending wave after wave of pleasure through your body--still her magic pleasurably denies your orgasm. After a while of frantic licking, the phalluses--loudly slapping against your flesh--get thicker, Sanura's moans get louder, and she locks her animalistic hind legs around your head.

Suddenly, you hear a loud snap and feel the magic engulfing your genitals disappear. As your long-abated orgasm violently rushes out, Sanura lets out a lion-like roar and cums, flooding your face with her flavorful fluids. While she orgasms, still firmly holding your face against her sex, the dildos merge into one massive magical cock that floods your insides with arcane cum. After it finishes filling you up, it dissolves, leaving you with sudden and strong feeling of emptiness; a feeling that is quickly suppressed as the magic begins to create even more fluid that fills you to the brim.

She finally lets you go, but you can't stand yet--still panting and trembling from the recent ordeal. Her conjured fluids linger pleasantly in your insides despite the pressure on your rectum. So, tired and filled, you lie on Sanura's belly for a long while, a dopey, pleasured look on your face. 

Sanura pats you on the head affectionately with one of her front paws. [say:Hope you had as much fun as me.] All you can give for an answer is an affirmative smile as you rise to your still shaky [feet].