Lincoln Loud was sitting up in bed and reading a comic, a glass of soda and a bowl of pretzels sat on the nightstand next to him. Outside, the world was a swirling vortex of snow: Lola and Lana threw snowballs at each other's' faces, Lynn and Luan worked on a snowman, and Leni laid flat and unmoving on her back. When Lori asked what she was doing, she piped, "Making a snow Leni." Lori rolled her eyes and walked away.

"You know," Lincoln said without looking up from his comic, "I'm beginning to detect a pattern here." He flipped a page. "I mean, I might not be a freakishly gifted genius like Lisa, but I'm not dumb. Think about it: Thursday Lori comes in here and strips naked...Friday Leni does...ummm...whatever that was...and today...well, I think something else is going to happen. Call it woman's intuition." He reached out and grabbed his glass. "And I think..."

He trailed off when a knock came at the door. He looked at the fourth wall and smiled. "It's going to happen soon. Come in!"

The door opened and Luna poked her head in, her eyes half-lidded and the corners of her mouth turned up in a sinful smile. "Hey, bro, can I come in?"

Lincoln took a drink and sat the glass down. "Sure." He scooted closer to the wall and patted the spot next to him. Luna grinned and came in, closing the door behind her (and engaging the thumb lock). She was dressed in her normal attire: Purple shirt, purple skirt with black stripes, and purple boots. She sauntered over, her hips swinging back and forth and her eyes flashing with a devious light. Lincoln's dick stirred, and he brushed his teeth across his bottom lip. She crawled onto the bed, then snuggled up next to him, her bare arm touching his; her flesh was warm and smooth and she smelled like lilac. She put her arm around his shoulder and drew him close.

"How you doin', bro?"

Lincoln nodded. "I'm good. You?"

"I'm alright." She turned, her lips dancing fleetingly over his ear and her breath puffing hotly against his skin. "I need a favor, though," she breathed.

Lincoln's dick was standing tall and proud now. "What's that?"

"Luan broke all my stuff in a prank gone wrong – my guitar, my drums, everything, man. I got an itch to make music but no instruments to...play with." She ran her hand over his thigh, her fingers splayed. When they brushed his bulge, he drew a sharp intake of breath. "Can I play your instrument?"

She was already unzipping his jeans, already reaching in. He shuddered as her fingers kneaded him through his undies. He put his arm around her waist and turned to her, evil in his eyes. "Of course...I'm always happy to help a sister in need."

She massaged his tip and tilted her head until their lips were touching, the sweet smell of her breath filling his nostrils and working on his mind like an aphrodisiac. "Thanks, bro," she panted, "I knew I could count on you." She traced his bottom lip with her tongue as she slid her hand into his underwear and wrapped her fingers around his base. He twitched, the movement driving his lips tighter against hers. He kissed her, and she kissed him back as she started to firmly but slowly move up his shaft, her calloused fingers expertly working his soft, fevered flesh. Lincoln cupped her freckled cheek in his hand as the kiss deepened; she moaned delightedly into his mouth, and his hips jerked forward as she reached his sensitive head. Her thumb brushed the tip and collected the dew of his arousal; when she stroked down, it smeared hotly along his length.

The kiss broke and she pressed her forehead to his. Her cheeks were on fire and her eyes were shimmering with lust. "Do you want to touch me too, bro?" She squeezed his member and stroked to his base.

Lincoln could only nod.

"Lay down."

They stretched out next to each other on their sides, their lips molded together and their bodies pressed close. He laid his hand on her thigh and moved it along her sizzling flesh as they kissed again, her fingers caressing his dick more quickly now as her passion began to rise. She spread her legs, and his hand disappeared under her skirt; he felt her dank heat before her even touched her slick center. Her lips were like burning silk, and her juices seared his skin. She pulled her lips away from his and sucked a gulp of air as he kissed her clit with his thumb; her grip tightened, and precum oozed out of him, spilling down his shaft and onto her hand. He kissed her chin, her neck, her collarbone, the salty taste of her skin and the way her sex trembled under his touch driving him wild with lust.

"Yes," she moaned as he rubbed her quaking nub; his middle finger dipped into her well, and her hips bucked. "Awww, fuck!"

He rubbed faster in a firm circular motion as he penetrated her with his digit. She stroked him faster, harder, her hand making a wet sound as it glided over his slick member. She bit her lower lip and moaned, the needy movement of her hips causing her walls to close around his finger. Fire filled his stomach, and he felt himself losing control. He kissed the underside of her jaw, her neck, the throbbing vein in her throat, his breath coming in ragged gasps and tiny grunts escaping her lips. "F-Faster," she said. He stopped rubbing her clit and added his index finger, prying her sticky lips apart and sinking it deep into her. She cried out and shuddered, then started to jack him harder, the friction of her skin moving wetly over his making him dizzy. He moved her shirt up with his free hand, and her full, dew-drop breasts popped out. The areolas were brown and inviting. He wrapped his lips around her erect nipple and drew it deep into her mouth.

Suddenly, she clamped her thighs against his hand and cried out, her body shaking violently as her orgasm burst through her. She bore down on his dick, and his eyes squinted as his load rushed up from his depths and shot from him in a geyser, spraying the front of her skirt and her bare stomach, glistening like quicksilver on her rippling flesh. He moaned and threw his hips forward, pumping even more of his seed onto his already drenched sister. She let out a series of gasps, moans, and whimpers as her climax lingered through her.

When it was over, they held each other and panted. "Damn, bro," she snickered, "that was a righteous jam sesh."

Lincoln nodded. He felt empty and spent and tired – and good. "Yeah."

She looked at him with a wicked smile. "We gotta do it again sometime."

Lincoln grinned and kissed the corner of her mouth. "Any time."