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Dark Dreams, Forbidden Fantasies	By : GeorgeGlass Category: +M through R > Phineas and Ferb Views: 27128 -:- Recommendations : 2 -:- Currently Reading : 1
Disclaimer: I do not own Phineas and Ferb or its characters. I made no money from writing this story.

Chapter List
- 3
- 4
- 5
Chapter 4
“So...,” Candace began awkwardly, “that was a thing.”
“Uh-huh,” Phineas agreed. “And...I’m a little surprised we’re still here. I mean, in most dreams like this—not that I have a lot—I usually wake up before, you know, the good part.”
“Yeah, me too,” Candace said, curiosity starting to overcome the awkwardness. “Why do you think we’re still dreaming?”
“Beats me. Maybe...”
“What?”
“Well, like you said, we’ve got issues. I mean, I never thought that I’d want to actually do that with you.”
“You think you’re surprised?” Candace replied.
“So...maybe we’ve got, you know...other things we want to do. Together, I mean.”
“Like, sex things?”
“Yeah.”
“Um, I guess that’s...possible.”
“So...maybe we should figure out what our deepest, darkest fantasies about each other are, and then...you know...do them.”
Candace stared at Phineas for a long moment before she spoke.
“Okay, but...we have to promise to never, ever talk about it after. What happens in dreamland stays in dreamland.”
“Fair enough. And we have to promise to be honest with each other, too. You know, about what our deepest, darkest fantasy actually is.”
“O- Okay,” Candace agreed. “So...what’s yours?”
“Um, okay,” Phineas said, trying to compose himself. “Well, remember that time when you beat all of us at Giant Skiddley Whiffers, and you were, like, dancing around and spanking yourself?”
Candace’s wide eyes widened further as she replied, “Don’t tell me you want to spank me.”
“Nah,” said Phineas. “That’s not what I’m getting at.”
“Good. ‘Cause spanking’s for weirdos.”
***
“Harder, damn you!” Suzy hollered as she lay bare-assed across Jeremy’s lap, her small white bottom sporting several overlapping red handprints. “I’m a bad, bad girl! HARDER!”
***
“It’s just,” Phineas said, “that it made me notice your butt, and I realized that...I kind of like it.”
“Oh, yeah?” Candace said.
She was clearly more relaxed now, perhaps because she was relieved that Phineas was willing to go first. So she rolled onto her stomach to fully expose her bottom to her brother’s eyes, making the boy grin.
“What do you like about it?” she asked.
“Well, it’s like...you’re so tall—from my point of view, anyway—but your butt is so small and cute and, and tight. And it kinda makes me...makes me wanna...”
“What?”
“Well...”
“Hey, this ‘deepest, darkest fantasy’ thing was your idea. So out with it.”
“I- Iwannafuckyouinyourbutt,” the boy said rapidly.
Candace’s eyes widened.
“Oh. Wow,” she said.
“It’s- It’s too weird,” Phineas said apologetically. “I shouldn’t have-”
“Is that your deepest, darkest fantasy or not?” Candace demanded.
“Well...yeah.”
“Then we have to do it,” Candace declared. “‘cause we agreed.”
Without another word, Candace got down on all fours, facing away from her brother. Then she pushed her skinny ass toward him.
“You gonna put it in or what?” Candace said as she looked back at Phineas.
“Wow,” gasped Phineas as he stared at Candace’s little bare bottom. “You really want me to?”
“I didn’t say I wanted you to,” Candace replied. “I just said that I would.”
Phineas looked terribly confused. Candace sighed.
“I’m sorry,” she said. “We promised to be totally honest with each other. And honestly, I do want to do it. Or at least try it. Because maybe I’ll like it, and if I do, then maybe Jeremy would like it too. And if I don’t like it—I mean, if it doesn’t feel good—then I can make it feel good, because this is just a dream.”
“Gosh,” Phineas said, “you’re right! This is the perfect place to experiment. We can do anything we want in here, and there’s no risk!”
“Exactly,” said Candace. “Now let’s do this thing.”
“Oh, yeah,” Phineas replied, his eyes big with desire as they fixed on Candace’s sweet little ass. “I definitely want to do that thing.”
Phineas made some clear, gel-like lube appear on his fingers. Then, slowly so as to savor the experience, he began putting the gel on and then in Candace’s tight pink asshole.
“Hmm,” Candace said as Phineas’ finger moved inside her little hole. “That actually feels kinda good.”
“Then maybe it’ll feel even better when I put my dick in there,” Phineas replied, starting to work his finger in and out for reasons that had nothing to do with lubrication.
“Ooooooh,” Candace sighed. “Definitely good.”
Phineas kept fingering Candace’s ass, rhythmically sliding his finger into her again and again, until he was pushing it as far in as it would go on every stroke. Then he added a second finger.
“Oh God,” Candace moaned. “This is nice...”
“You really like it?”
“Yeah...,” she breathed. Then, after several more seconds of finger-fucking, she added, “But it’s...starting to feel...like a tease...”
“Well then,” Phineas replied, “let’s get to the main event.”
“Y-yeah...Gimme...that dick...you promised me...”
Phineas’ penis was granite-hard and his voice was breathy as the boy replied, “Oh God, yes. Right now.”
He wasted no time; he immediately put the head of his cock against Candace’s pale-pink asshole and began to push. And he was instantly rewarded with the exquisite sensation of Candace’s tight ring around his head and then his shaft as he sank in.
“Ohhhhh, God,” the boy moaned. “Candace...you feel so good inside...”
“Mmmmphhh,” Candace groaned. “Phineas...it feels huge when you put it in there...”
“Do...do you want me to stop?” the boy asked, the tone of his voice betraying his fervent hope that she would say no.
“Uh-uh,” she breathed. “Go...go deeper...”
The incredible feeling of having his cock inside his sister’s sweet, tight, furnace-hot ass, combined with her verbal encouragement, was too much to resist. In one long, slow stroke, Phineas pushed the rest of his length into her.
“Aaaahhhh!” Candace cried, squeezing her eyes shut. Before Phineas could ask her if he’d hurt her, she gasped, “That feels so good...”
“Then I hope you’re gonna like this,” the boy panted.
He started fucking her slowly. Both brother and sister made tiny moans on every in-stroke and little gasps with each out-stroke.
“Oh, Candace,” Phineas moaned as he pumped her steadily, “your butt is amazing...”
“Tell me,” Candace panted, beginning to thrust her ass back to take her brother’s length deeper inside.
“I like everything...about it,” Phineas gasped. “Looking at it...holding onto it...how hot and tight and good it feels inside...”
“It feels good...to me...too,” Candace breathed. “Like I’m...filled up...inside...And when you...move in and out, it’s...ohhhh...”
Phineas, his arousal growing by the second, asked, “Can I...go faster?”
“Uh-huh,” Candace panted, nodding.
The boy started fucking his big sister’s ass more rapidly, screwing his eyes shut as he did so.
“So...good... Candace...,” Phineas grunted.
“So nice...,” Candace whimpered. “So nice…in my ass...Want...want more...”
“More?” Phineas gasped.
“Want you to...cum in me,” Candace panted. “Cum in my ass...cum...a whole gallon...if you want to...”
At the speed at which he was fucking his sister’s asshole, Phineas might have managed to last a few more minutes before the need for orgasm overtook him. But now, the thought of cumming in Candace’s ass—of cumming a gallon in Candace’s ass, and that she wanted him to do it—suddenly had him pumping his sister as fast as he could.
“Gonna...do it...Candace,” he huffed. “Gonna...cum...a gallon...in you...”
“Do it,” the girl gasped. “Fill me...fill me up...”
“AaaaaaAAAAAAAH!” Phineas cried out.
Plunging as deep into Candace’s body as his cock could go, he began shooting thick gouts of cum into her, one after another. His fingers gripped her perfect ass as he came and came, filling his sister with hot, thick, plentiful liquid seed.
“Oh Phineas oh God I’M SO FULL!” Candace shouted, thrashing in orgasmic bliss as her flat tummy began to bulge with Phineas’ warm, copious cumload.
When they finished, Candace collapsed onto the bed. Phineas lay on her back, his cock still inside her.
“Wowwwww,” Phineas sighed, laying his head between Candace’s shoulder blades.
“Yeahhhh,” Candace purred.
They lay there for a good while. Phineas, who now had good control over his dream-body, kept his cock just hard enough to stay inside his sister’s warm, welcoming ass, keeping his gallon of cum inside her.
“You know,” Candace giggled, sounding a little loopy, “I usually think of you as a pain in the butt…”
END CHAPTER 4
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Dark Dreams, Forbidden Fantasies