Asa and Fawn diligently followed as Pramba led them along the well-worn dirt path and explained the history of Escoria. It was a fascinating tale full of rich culture and magical feats right out of a fairy tale. The land was home to many kingdoms, and this city of Fontaine to which they were headed was the capital of Fortuna, the largest kingdom from which the armies of men were trained and deployed to fight the Demon King. However, each year a pair of former humans like them were summoned by the "Elders" who were some sort of divine council that overlooked the affairs of Escoria, and had the power to bestow supernatural gifts upon people but somehow weren't able to defeat the Demon King themselves.
Asa found that part a bit suspicious and wondered if there was something more to the whole situation. He had to admit that it felt a bit unfair that they could summon people against their wills, or at least without their consent, and now those people were forced to put their lives on the line. Pramba seemed to think that this was just the way things had always been, and that they should even be grateful for the "privilege" of their current situation.
It was beginning to get dark after walking for a few hours, listening to Pramba excitedly tell them all of these things, and both Asa and Fawn were beginning to tire. Also, a familiar itching was beginning to build again that signaled their bodies' special purposes would need to be exercised. Fawn had felt it in her loins as soon as she noticed that her brother's cock was a bit inflated and protruding from his crotch even while he walked. It was such a nice, delicious looking cock, and the fact that she had already tasted it and had it in her mouth made her want to repeat that act again right this second.
"Pramba?" Fawn said sheepishly. "I...uh, can we take a break or something?"
Pramba nodded happily. "You need to feed again, I'm sure. We can camp here for the night."
There was a large tree about twenty paces from the dirt path that would make a fine spot for a campfire. Pramba pointed to it. "I'll gather some sticks for a fire while you two enjoy yourselves."
"Shouldn't we help?" Asa asked, feeling bad about making their fairy companion do all the work.
"No way!" Pramba insisted. "This is exactly why I'm here, to do stuff like this so you two can focus on the task at hand, which is to get strong. Just worry about that while I get a fire going."
Before he could protest, his sister was on her knees in front of him right there on the dirt path, her face right up against his growing cock and her hand massaging his heavy balls. He groaned with pleasure.
"Fawn...right here?"
She nodded eagerly, her eyes practically pleading with him. "Please."
She took his penis into her mouth and ran her tongue all along the underside of it while her lips moved up and down his shaft. He winced from the wonderful feeling that she was giving to him, able to ignore Pramba as she flew all around them and gathered whatever kindling she could find while they were having incestuous fun. Asa wanted to return the favor to Fawn and pleasure her as well, but she honestly seemed to get as much pleasure from orally servicing him as she might get from his clumsy attempts to make her feel good. He wasn't very experienced with having sex yet though he wondered if that really mattered. Fawn hadn't been with many guys before either and she was seemingly very good at sucking his dick at this moment. It seemed like their new bodies were able to perform for each other in a way that was mysteriously perfect for making them cum.
Asa kept making whimpering sounds while Fawn sucked him off. Her hand drifted between rubbing his taint and gently stroking his balls. She wasn't making any sounds at all the whole time she sucked on him, but after a few minutes of doing this she suddenly withdrew her face from his crotch and grimaced while her hand grabbed his cock and squeezed rather hard.
"I'm cumming!" she exclaimed, thrusting her hips into the air while she knelt in front of him.
Asa couldn't believe she could do that just from blowing him. She hadn't even been masturbating herself and here she was having an orgasm just from the excitement of making him feel good. He was overcome with both gratitude and surprise, and those feelings combined with her tight squeeze of his cock finally did him in. Too surprised to warn her, he started ejaculating right then and there, climaxing along with his sister. His cum shot out and painted her face, making her cum even harder than she already was. He kept squirting his load all over her in strong bursts of sticky semen that went on forever. He was grunting with each forceful contraction that caused his cum to spew out, weakly thrusting his cock into her tight fist like he was fucking her hand. She held on strong the entire time even though she was quite distracted by her own pleasure.
When they were both satisfied and calmed, their eyes met and they smiled at each other. Fawn's face was covered in his cum, which clung to her fur wherever it had landed on her instead of dripping down her body like it probably would have done on her bare skin. Still, there was some semen on her chests and neck though it was scant compared to the heavy deposit that decorated her face. She licked her lips to taste his offering before using her free hand to scoop every bit she could into her mouth. She didn't let go of his cock yet, however, and soon she was back to sucking on it again.
"Fuck..." Asa sighed in pleasure. "That feels so good you have no idea."
Fawn moaned appreciatively. "I can't believe I can cum just from sucking you off. But I still want to fuck you, is that alright?"
Asa nodded enthusiastically. "Yes, please! I can still cum in your mouth if you want. My aim hasn't been very good lately though, haha."
Fawn used his hard cock as a scraper and collected the last few drops from her cheeks and forehead before licking him clean. "I can't believe we're doing this. It's not like I even thought about having sex with you before, but now I can't stop thinking about it."
He nodded. "Yeah, I know what you mean. I mean, I always considered you attractive, but I didn't look at you in that way before."
She smiled. "It's these new bodies. They were designed to be addicted to each other, like Pramba said. We're just doing what we're supposed to do. It's not wrong if these Elders made us to fuck each other to survive."
Pramba returned to their side now, smiling as she saw them still sexually interacting though she had missed the show. "Hey you two, I have the fire going now. Want to bring this party to the camp?"