"I think I know what Mom's test is."
"We still don't know if Mom is actually testing us."
"Hear me out," Seay smiled at his twin. Their faces weren't terribly alike, but their smiles were. She smiled back, but with one eyebrow crinkled skeptically.
Seay sat up. They'd been laying still on their backs, heads together, fully (Tracy) and mostly (Seay) nude bodies sprawled in opposite directions. Now Seay was upright from the waist up with his back to his sister. He peered over his shoulder at her. She looked asleep. He sipped from his mug. The coffee was still hot. When he set it back down, the steam swirled up into the morning light slanting in through the window between their beds. It occurred to him that steam looked somehow more sentient when it was in sunlight. As it rose, it was like it was just waking up. Probably wondering what that funky smell was. That would be the twins' pheromones. God. It just kept being crazy to him: he was in an active, ongoing, incestuous relationship. Two if he counted Mom. But still, what he had with Tracy was particularly special. Real-feeling. Heck, sometimes he could even will it to feel 'normal'-feeling.
"I'm listening," Tracy murmured.
"Huh?" Listening to him? Sometimes it was like she could read his thoughts. This wasn't unheard of in twins, except Seay never could seem to guess what was going on in Tracy's messy, covertly kinky brain.
"Your theory," she yawned. "Mom'sszzzz test," she stretched.
"R-right. Yeah." He shook his head. What had they been talking about? Oh, yeah. The test. "So... so Mom knows. About us. Right?"
"Uh-huh," Tracy nodded, her eyes closed.
"And yet, she's somehow okay with it."
"I'd say more than," Tracy said.
"More than okay with it."
"She drank my pee."
"Right," Seay blinked. He had also let Tracy pee on him yesterday. Did his sister have a secret pee fetish? "But so. Uh. Then if there's a test, and I feel like we might as well assume there is, since even if there isn't - "
"We still come out in her good graces."
"We - yeah. Nice," Seay chuckled, and accepted Tracy's request for a backwards laying-down high five. Slap.
"But so what's the test?"
"We can't have sex."
"Oh, so you mean the most obvious possible thing."
"Says the girl who was one layer of cotton away from raping me."
"Don't use that word." She tilted her head back and shot a disgusted look at him. "I'm not joking."
"Shit. Okay. Sorry."
"I'm serious," she scoffed, but relaxed again. "Anyway! If we can't frick, right, then I guess ... do you wanna sixty-nine?"
"W-what?"
"I mean," Tracy talked with her hands. She spoke up at the ceiling mostly, but occasionally craned her head back to look at her brother. He was sipping his coffee so slowly. She'd practically chugged hers. "We've already done basically everything else. And you're saying Mom secretly doesn't want us to have sex. Even though she's cool with drugs and incest. But so. By process of elimination. Next thing on our itinerary is sixty-nine, right...?"
"Itinerary?"
"Do you not want to?"
"I mean, I do. Yeah. Obviously. But like... I hear it's pretty overrated."
"What's not to like? You clearly enjoy my p-word. I clearly enjoy your 'COCK,'" Tracy air quoted, reminding him it was him who told her to use that (occasionally admittedly somewhat jarring) word.
"I guess I'm just pretty sure we're going to be, like, bad at it."
"Uh-huh. Tell me, how am *I* the twin who can never seem to get her shit together, and yet I'm also the one who isn't afraid of putting in a little practice?"
"You would ... want to 'practice' sixty-nine with me?"
"Maybe I, like, ate part of you in the womb or something."
"You would seriously do that?"
"Well, not like on PURPOSE," Tracy frowned up at the ceiling. She flicked her hands like, WTF. "I mean, I was a fetus. But it does sound like something I'd do, yeah."
"I mean, you'd 'practice' with me," Seay clarified, his utterly authentic smile unphased by his sister's capacity for cannibalism.
"Oh," Tracy blinked. She rolled over so she could perch on her elbows and look up at him. Ooh, and because the chaturanga felt nice. "I mean, if you think it wouldn't count as failing Mom's test."
"She taught me how to eat you out."
"Lickies. I prefer to call them lickies."
"Lickies, for real? Are you a Sesame Street character now?"
"I want us to practice lickies and suckies so we can learn how to cum in each other's mouths at the EXACT same time."
"..." Seay opened his lips to respond, but didn't have a comeback.
Tracy cackled proudly. She'd blown his circuit.
"Knew you wanted to!" she sang, and sprang up onto all fours. "Lay down you big handsome idiot!"
"I'm finishing my coffee."
"I'm going to piss on this carpet if you don't lay down this instant."
"You are not."
"I am not joking. I've got a full tank. You saw how fast I drank my coffee."
She lifted one leg to the side, like a dog about to mark a bush.
"I just scrubbed this carpet yesterday. If you even squeeze a single drop of pee onto - "
"How could you possibly stop me?"
"!" Seay knew in an instant what she was up to. "You are goading me into cunnilingus."
"First of all, gross. It's lickies. And second of all, I am goading you into suckies as well." She crawled up behind him, now, and draped an arm over his shoulder. She caressed his left pec. She circled her fingertip around his right nipple. She nibbled his nape. "You're good at it. I promise. Just finger me while you suck my clit, and I can cum really fast." Her voice's breath warmed his neck and raised shivers up into his scalp.
"But if I'm focusing on you, how can I also, like... focus on what you're doing?"
"Are you asking me how to 'focus' on receiving a blowjob?"
"I - " Seay faltered. He blinked. He sighed. He set his coffee mug down again. He laid down on his shoulders.
"Yay," Tracy nodded. "Now lie still. I will bring her to you."
"Underwear off?"
"If you would be so kind."
"It's just... kind of hot when you help."
"Fine," she shrugged. "I can help. But I'm sitting down first."
"Sitting wh-?" Seay began to ask, when his sister straddled his face midsentence. She was right above him, her crotch and butt and pussy and asshole and tailbone and all of her right above his mouth. Then she sat. She settled. And here she was, sitting on his brain. He opened his eyes to a view of her towering spine, lower back dimples and, blurry in the extreme foreground, her squished-apart butt cheeks. She'd plopped directly on the center-line of his face, so that the tip of his nose was snuggly nestled in her taint, his lips - still in the 'oo' shape at the start of the word 'where' - now puckered against the slippery inner workings of her spread-apart labia. His hands had been ready to help catch her in case her full weight cracked his skull or dislocated his jaw, but it turned out his skull and jaw were both perfectly strong enough to fend for themselves, and she meanwhile had ex-gymnast balance. He was fine. She was fine. And now she was patting him on the hips to remind him to lift so she could help remove his briefs.
She pulled his underwear all the way off. They caught briefly on his foot.
"Hup," she said, and popped his foot free.
And now he was naked. She was on top. And her p-word was on his mouth.
"Alright, big boy," Tracy said. "Come to Mommy." She leaned forward. "Or, well, come to Sissy, I guess. Since now we have to differentiate."
"Nnnf," Seay groaned. His face was full of vagina. He was completely and complexly smothered. It was like every wet, warm, sticky, and slippery part of her underside was trying to find a new home on his tongue.
"Oooh," she groaned. "Oh, Seay. This was such a good idea."
"Ffffff," he moaned.
"You are the best at lickies," she assured him.
She wiggled her hips. She played with his somewhat flaccid cock, teased it and pawed at it, watched it literally squirm like its own sentient little organism. She play-bit it. Seay didn't even gasp. Oh, yeah - he couldn't. But so she did it again, a little harder. This time he jolted underneath her. She giggled breathily and murmured an apology, then licked the place where she had bit him. Then she suckled on it. Then she got really, really horny and shoved his whole cock into her throat.
His cock continued to harden inside of her, and her tongue could feel the warm blood surging through its veins. It tasted like him. She enjoyed his cock.
"Mmm," Seay groaned. "Ghhhhk. Rff."
Being on the bottom was a little daunting for Seay. HIs sister's pussy wasn't just intensely juicy right now, but it also made him salivate profusely. Nevermind that her anus was right there again, almost literally enveloping his nose, and didn't NOT smell like what it was. The whole of her, altogether, quite literally ON his mind, all of her all at once. She flooded him in every sense of the word. Drenched him inside and out.
Especially once things started getting humpy and grindy - neither twin could fight the bodily impulse to 'fuck' the other's mouth - Seay's challenge grew downright harrowing. Sometimes she'd clamp his whole entire face in the wet, boiling hot dark of her hindquarters. He would be unable to breathe. Unable to think. Unable to do anything but lick and suck and slurp and gulp and try to hold out hope for oxygen whenever next she relaxed her ass and hips and legs again.
So she came quite a few times before Seay came once. And it wasn't simultaneous by any means. In fact, she had kindly slumped off of him to give his poor, beat-red, dripping wet face a rest, and was now just kind of half laying across his lower abdomen, woozily, dreamily, avidly with her head kind of resting on him, stroking and milking and sucking her brother's cock. She sighed and hummed and groaned intermittently. Then at one point, she nuzzled him, maybe just to be cute, but it triggered a sudden concussive blast of semen across the side of her face, onto the folds of her ear, into her hair, and halfway up her brother's stomach.
"Sorry," Seay gasped. "I... I didn't realize that would happen."
"How many times have I cum on your face today?"
"Y-yeah, I... lost count."
"So shut up. We're fine."
"Okay," he said. "We're fine. It's just each other's cum."
They lay there together for a minute or two, panting and recovering, her hand still wrapped around his spent, sticky cock. She squeezed.
