To the altar, finally

The three of you step into the newly upgraded altar room, the two angels admiring its dark beauty as you lay them down side by side on the crimson cloth. Both of them are incredibly tense: Mariel's breath comes in heavy pants, her hands working up and down her form, while Seramiel is so still you worry she might suffocate for lack of breathing. Kneeling down between her legs and pushing back her toga, you flick her slit once, twice, three times with your long tongue. You snake into her folds, eliciting a few shudders and finally a long moan as her legs slump down on either side of you, the tension leaving her body. You reach up and grab two handfuls of titflesh through her robes, squeezing a few times, and then with one last lick you step back, earning a frustrated whimper.

Before she can voice her complaints, you bury your head in her eager companion, devouring her juices as your hands caress her legs. Mariel convulses the moment you make contact, somehow already shuddering in orgasm in anticipation of what's to come. You probe her hymen a few times, pushing against the firm barrier with your tongue before withdrawing and standing up to a needy pout from the seraph. Your cock now stiff as it's ever been, you round the altar and tap it against her greedy lips, and it quickly sinks into the warm, wet cavern, her tongue trying to strangle your shaft as you start to pump in and out of her throat. Your hands reach forward to maul her ripe melons as you unleash your first of many loads directly into her stomach, earning another convulsion from the woman you're lodged inside.

You feel a tapping on your leg and look over to see her twin with her head hanging similarly off the back of the altar, her mouth hanging open in invitation. With a wet pop you dislodge yourself from Mariel's throat, then move to skewer her counterpart as fast as your legs will carry you. Her throat spasms around your cock, expelling you as a coughing fit overtakes her. "Still need some practice there, eh?" You grin and leave your head right above her lips, letting her take it back into her mouth when she's ready. After a few more coughs, she gently wraps her lips around the tip, swirling her tongue and lightly nibbling on the cap. You look down the altar to see that each angel has a hand between the other's legs, Mariel furiously moving hers while Seramiel gently strokes the more enthusiastic angel's petals. When you finally explode into the elder's mouth. her tongue and lips greedily suck every last drop down her throat, and she lets out a satisfied sigh as you dislodge yourself.

"Master... please..." the younger begs, and you order both of them on to their stomachs. Walking around to the back of the altar, you pull Mary's legs until her rear pokes over the edge, eliciting a surprised yelp as she feels your rod poke into her backdoor. Already slick from both of their mouths, you unceremoniously push your way in, sighing in bliss as you enter your devoted captive's rear hole for only the second time. You slam in and out, anchoring yourself with a hand on each firm globe in front of you, repeatedly ploughing the angel until she can think of nothing else. A wet smacking calls your attention, and you find yourself somehow stiffening even further to the sight of the twin angels locked in a passionate embrace, tongues twisting together as each has one hand furiously pumping in the other's slit and their other hand on the back of her partner's head. You don't last long at the sight, pumping a few more times before you fill your partner's bowels with jets of white, emerging with a slick "pop" before you bury yourself in the other writhing body in front of you.

Whatever apprehension Seramiel had at the start of this has long since gone, and now she can do little but moan and twist as the two of you **** her body from both directions. She convulses repeatedly, climaxing several time as if in an effort to gain the lead after her slow start, begs of "more" emerging between the smacking of lips. You reach up and take her nipples in your hand, lightly pinching and twisting them, and are rewarded by yet another shudder as the angel's limbs writhe randomly, her bodily control all but gone. By the time you release inside her, she's a barely moving mess tangled in Mariel's arms, all thoughts of anything but receiving your seed forgotten in her repeated climaxes.

After a short pause, your cock is painfully hard as you ready yourself to truly complete the ritual. "Mary, I want you on your back. Sera, lie in her arms on your stomach." The two angels slowly pull themselves into position, embracing in another passionate kiss as you position your cock at the elder twin's entrance. "Are you ready, Sera? There's no going back." She disentangles herself long enough to say "shut up and make me truly yours before I change my mind." Needing no further invitation, you press into her heavenly folds, tensing and then shoving your hips forward as you meet some resistance.

The angel's insides feel incredible, and you find yourself letting loose another load as soon as you're all the way in. Suddenly, the angel bends back and lets out a piercing wail. Before you can do anything, it shifts into an ecstatic moan as her body begins to repeatedly convulse. A hot wind blows through the room, and as her feathers ruffle you see blots of inky black expand outwards, quickly painting her entire wings the colour of night. The breeze catches her hair, and as it blows around her face it shifts into a deep, blood red, her toga staining itself to match. A thin, barbed tail grows just above her backdoor, shooting out of her body until it wraps around your legs, some two metres long. Finally, two black horns poke through her hair, a blazing ring of fire erupting above them yet seemingly not damaging the cloth or her counterpart below her.

You roar as an incredible amount of mana rushes into you: mana you won't be able to contain for long. Eager to see the changes your second conquest will bring and not wanting to waste the power of this ritual, you pull yourself out of the hungry slit and stab into the hole just below it, watching a similar transformation take place to the other angel. This time, red and black are swapped, and her tail is spaded instead of barbed, but the two fallen angels are still clearly cut from the same cloth. You've scarcely admired her changes and released into her warm cave when you feel another surge of mana enter you. You barely glance at the opened menu in front of you, only two options of interest given your vow to pick a practical, combat-focused upgrade next: ice from before, and holy, a unique option given the circumstances. Seeing as you might not get the chance again, you pick holy, and roar in pain as your body changes. Your tail thickens and sharpens, plates of bony armour cover your chest, your teeth sharpen and elongate, and a second, larger pair of horns erupts from your forehead. The skin sloughs off your wings as they harden and blanch, leaving a bony skeleton with nasty spikes protruding from each section.

With the mana released, you turn your attention back to your two writhing concubines, each desperately attending to the other in the absence of your thrusts. You begin to move once again within Mariel, and snake your new tail around her dark twin's legs. You lift her up, surprised at the ease with which you do so, and notice that you can flex your tail's spiked end into your body, leaving a broad, fleshy tip. Grinning, you shove it into her hole. The sensation is pleasant but muted, but as the angel climaxes and throws her arms around your neck you can tell it'll have its uses. At this point your group is merely a pile of twisting bodies, all words forgotten as your shaft pumps into Mariel, your tail into Seramiel, and your tongue exploring every nook and cranny of the latter's mouth. After unloading a fresh batch of sperm into the younger angel's womb, you pull out, your stuff rod brushing against the elder's ass. You remove your tail and drop her, earning a surprised yelp until she impales herself on your meat, and you feel her start to use her surprising strength to bounce up and down on your arms as you snake your tail into her sister's waiting snatch. With one last explosion from your tip and convulsion from your two partners, the three of you fall into a heap on the altar, utterly spent. You engage in an awkward three-way group cuddle, still lodged inside both fallen angels as you catch your breath. You're just starting to contemplate another round when the dungeon rumbles and you hear Ari shout from the next room. "Hey babe, I'm glad you're having a good time with your toys, but we've got company!" You sigh and pump a few more times into Seramiel, releasing one last load before pulling yourself and your partners to your feet and running out the door.