Yes, that was fast
Twilight idly pondered her situation, swaying back and forth on her hooves. On one leg, invading Spike's privacy was not a nice thing to do, and she shouldn't even have considered it. On the other, her curiosity was gnawing at her with such vigour it threatened to rip her up from the inside. On the third, what was the worst thing that could happen? Seeing the two playing a tabletop game together?
The alicorn quietly opened the door to the room the two were in, her magic making short work of the lock. She was greeted by the sight of Spike's twin dragon cocks pistoning in and out of Gabby's rear holes, one buried in her ass while the other plunged into her cunt, as the griffon loudly moaned.
Oh what a terrible thing, the alicorn thought, frozen in shock. But how could she have known? If only she'd heard the moans or the slaps of the dragon's scales on the griffon's ass, or if she'd seen the shadowy outline of their bodies merged together projected on the door, or if she'd smelled the pungent musk of sex from outside the room! But instead there she was, inadvertently witnessing the debaucherous display, right as she'd been testing her invisibility spell, and carrying her totally-not-a-dildo piece of lab equipment! Oh what could she do, stuck there, the smell of sex getting to her brain and-
Spike sighed and rolled his eyes, as he heard the alicorn's first scream, signalling how she had begun to thrust the oversized horsecock-shaped dildo into her cunt. That she had to put on the whole acted out bit of her running into them was quite tiring, but it got her in the mood and Gabby liked having someone watch, so it was alright in the end. It was a nice callback to how it had all happened the first time, after all. He leaned forward, running his tongue over the griffon's feathers and nibbling on her ear.
Gabby moaned below him, sweat dripping from her brow. "I still can't believe Rarity never gave you a ride in all those years. She's got no idea what she missed out on." She arched her back, moving her hips to meet Spike's thrusts.
"I can't believe I wasted all that time going after her! Though to be fair you did jump on my cocks within the first two hours from our first meeting, I don't quite think that's the standard," Spike replied, as he massaged the other's wings with his claws.
"It's not every day you get a chance to try out some dragon dick," Gabby justified herself between heavy breaths. "Gilda dated one for a while, and she told me stories, you know? I got curious. And damn, she wasn't exaggerating!"
Spike huffed, as his shafts kept grinding in and out of the griffon's folds. "I think the real reason is that you're a slut, Gabby."
"Of course I'm a slut, Spike." Gabby wrapped her tail around the dragon's torso. "That's why you love me."
The dragon chuckled, then clenched his teeth, feeling himself closing in on his orgasm and wishing to prolong the experience a little longer. Something the tightness of Gabby's ass did nothing to help with.
Back at the entrance to the room, Twilight had now gone past the play pretend phase, and was simply plunging the toy between her legs with frenzied eagerness, enjoying the spectacle before her.
"What about Twilight?" Gabby asked, suppressing a moan.
"Huh?" mumbled Spike in response, still trying to focus on delaying his climax.
"Ever-Aaaahhh... gotten a ride with her?"
Spike shook his head. "Told you, she's only into mares. She likes to watch, but that's all."
Twilight's screams of ecstasy echoed in the room, confirming the dragon's statement.
Gabby pushed her hips against Spike's crotch. "Listen, sweetie, I think I'm about to..."
"Yeah," Spike huffed. "Me too."
"Wanna go together?" the griffon asked, feeling her lover's twin dragonhoods throb within her.
Spike gave only an affirmative grunt in response. Letting go of his attempts to hold back, he began to thrust his hips faster, his cocks sliding in and out Gabby's holes. Her asshole felt wonderfully tight, while her pussy was warm and inviting and massaged his length in all the right places.
Gabby began to thrust back with greater energy, moaning and biting her tongue. The way the barbs and ridges of Spike's cocks stroked her canals on their way in and out always felt amazing, and now that the dragon was going all out with his thrusting she could get to truly enjoy the way they hit all the right spots inside her. Focusing on Twilight's loud moaning, she slammed back one more time and reached her climax, fluids gushing from her sex as the insides of her pussy twitched around the dragon's length.
Feeling the griffon's folds contract around him, as well as the spray of arousal that hit his thighs, Spike let go and reached his own orgasm, his mind going blissfully blank for a moment as he unloaded shot after shot of dragon cum in both of the griffon's holes.
Gabby peacefully sighed, as Twilight's screaming in the background signalled the alicorn's own peak, and she inched forward, sliding the dragon's softening tools out of herself. "I know I've said it before, but damn, I'll never get tired of how hot it feels," she commented, turning to lie on her back and massaging her belly. "Why would anyone ever want to have sex with something other than a dragon?"
"Oh, I don't know," Spike said, leaning forward as his shafts retreated below his scales, "I can think of a few reasons to go with a griffon." He rested his body on top of hers, extending an arm below her to give her ass a playful squeeze.
Gabby giggled and smiled. "Oh, you." She moved to massage the back of his wings with her talons, and planted a loving kiss on the dragon's lips.