Darling Nikki

She collapsed onto the bed in exhaustion. She sighed contentedly and felt Mark kiss her on the lips lightly. She smiled against his kiss and opened her eyes. It was hard to focus for a second, but Mark hovered over her far enough away for her to be able to focus on his smiling face. "You good?" he asked.

"More than."

"You need to rest?"

"Not for long. Help yourself." She pulled him back down for a kiss and he joyfully responded. After a minute of kissing, with his hand traveling over her body, she relaxed into his touch. He nibbled her neck and collarbone, kissed down to her breasts and licked, kissed, and nibbled all around them. Finally his hand cupped her mound again and he applied firm pressure, but no movement, as he sucked on her nipples. Nikki instinctively pressed her hips against his hand, doing the work of seeking her own pleasure against his palm. Her clit was again sending shots to her heart and brain and she couldn't believe how much time her brother spent on her pleasure. Holy shit, he's good at this, she thought.

Again the battery was charged and it released again. She cried out in release, but before she could come back down, Mark grabbed her hips and flipped her over. She squealed in response, but didn't fight him. She knew what he wanted, and she was right. He pulled her hips up and she rose up to rest on her hands and knees. "You gonna fuck me?" she asked through gritted teeth, turning her head to face him. "You gonna fuck your sister and watch her ass as you pound into her?"

"Harder than you've ever been fucked," he warned. Her breath was forced out when he slammed into her with a grunt.

"SHIT!" cried Nikki when her brother impaled her. "Oh, my god, you're deep!"

He withdrew halfway and re-buried himself quickly. He was not frantic, but was quick and steady in his assault. He watched her pussy grip him as he withdrew, her entrance stretched around his shaft. Her backdoor was pink and faded to the pale flesh color of the rest of her, except for the bright pink of her engorged labia. She continued to whimper and wail as he drilled her, her ass making a steady slapping sound against the front of his thighs.

His juices had run down over her crack when he had played with her until she came on his hand, and now that she was bent over in front of him, he could see the glossy sheen of her excitement. He ran the pad of his thumb over her ass and she whimpered at his touch, her back arching when she flinched. He slowed down his thrusting as he pressed gently into her with his thumb. She cooed and looked back as he buried the digit until the thumbnail disappeared. He could feel her grip on his thumb and she felt just a little stretched, but favorably so.

"You're not making plans, are you?" she asked with a sexy smile and one eyebrow raised.

"No." He caressed her along her back and moved slowly in and out of her. "Especially after your little story about it hurting so badly with Tim."

"Like you said, Tim's a shithead. If I was prepped right, who knows? I might like it."

"God, Nik. Don't tease me like that."

She laughed a little, her brother feeling it in her pussy as it gripped his shaft. "You've got your cock buried in my pussy and your thumb in my ass. I don't think 'tease' is an accurate description."

"Point taken," he said, pressing his thumb and cock in deeper. Nikki gasped and cooed at the intrusion. "Tell me, then, do you want me to fuck you in the ass?" Mark picked up the pace, leaving his thumb completely buried while he plowed his full length into her. His sister dropped to her shoulders, her ass still in the air. Her hips began to convulse as she came around her brother's dick and finger.

"Fuck, Nik!" cried Mark. "I'm coming!" He forced himself into her as far as possible and cried out as his seed burst forth into her, splashing against her cervix and walls. Nikki collapsed forward and the rest of Mark's cum exploded out onto her back and ass, the weaker shots landing on the bedspread between her spread legs.

He was surprised when she spun around and took him into her mouth, sucking him clean. She was still excited, he could tell by her fervor as she sucked, licked and stroked him. "What do you say, Mark? Can you go again?"

"If you keep that up, I can!"

"Goody," she snickered before taking him back into her mouth. She turned around so that her hips were pointed back toward his head, sitting on her knees by his side. She continued to work him over and wiggled her hips. "Get me ready," she said before taking him back into her mouth again.

Mark stuck two fingers into her pussy and fucked her a few strokes before pulling them out and smearing their combined juices on her backdoor. He repeated the process a few times, to her delight, before pressing his index finger steadily into her. She cooed around his head and shaft as his finger sank into her back passage. He moved it in and out slowly, making her sigh and whine while she got used to his finger.

"Add another one."

Her brother slid his middle finger into her pussy before withdrawing it and pressing it alongside his index finger, stretching her out as she groaned with a mix of discomfort and pleasure.

"MMMMmmmm. . ." She took a few deep breaths and tried to relax. She finally let out one long, slow breath. "Wow," she groaned. "I don't know about this, Mark."

"Whatever you want, Nikki." He tried to soothe her with his tone and with the permission not to do this. She was languidly sucking him now, bringing him relaxed pleasure, but not frantic or passionately like she had been doing before. She focused on trying to enjoy the feelings of his fingers in her ass. She definitely noted the difference in the way her brother was treating her from the way Tim had done it. Mark was obviously concerned with making sure Nikki enjoyed it. In fact, she noted, he had not even suggested it, but waited for her to bring it up. They were in silent agreement that if they did anal tonight, it would be on her terms, not his.

"If we do this, can we stop if it hurts too bad?" she asked.

"Of course." Mark couldn't contain his excitement, even though he was going to be compliant to her needs. "Your ass is so perfect," he whispered. "I want to be inside so badly, but I don't want it enough to hurt you for it."

"You're the reason I want to try it again, Mark. If there's a cock in my ass, I want it to be yours."

Mark groaned at her words, the way she sighed as she said it. She kept sucking and licking him except for when she would let go to speak. Her head and mouth never stopped working and her body relaxed around his fingers. He began to thrust and twist his fingers in his sister's backdoor, trying to get her used to being stretched out. "You got any lube?" he asked. She pointed back to the nightstand and he withdrew his hand so he could open the drawer. She had some toys and lubricant in the top drawer. "I'm going to use a dildo next, okay?"

"Mmhmm," she nodded without letting go of his dick. He poured some of the lube directly on her anal opening, bringing a squeal and giggle. "That's cold," she laughed, and he watched her asshole twitch closed.

"Sorry," he laughed. He reinserted his fingers and she sighed at how much better it felt. He gently pressed the purple dildo into her ass; it was bigger than his fingers, but not as big as his penis. He considered it a good step to getting her ready. She whimpered at first, but quickly sighed as she got used to it. He slid it in and out of her passage, watching the head of the toy expand her entrance every time he withdrew it.

"You keep me lubed up good, and I don't think I'll have any trouble taking you back there," she smiled over her shoulder. She wiggled her ass a little. "In fact," she said, pulling off his fingers, "I'm ready!" She lay down on her stomach.

Mark scrambled to his knees and looked down at his beautiful sister. His cock was dripping with his own excitement and with his sister's spit. "Let me put this under your hips," he said as he grabbed one of her pillows. She lifted her hips and he slid the pillow under her hips so her ass stuck up into the air a little more. He warned her that he was going to add some more lube. She reached back and spread her own cheeks apart so that he could drizzle more lubricant on her wrinkled hole.

Her brother was enamored with her at that moment. Her butt was sticking up a little due to the pillow and her hands held her fleshy globes apart, making her pussy and butthole open a little in response. The pale pink ring dipped in at the center where a small opening awaited the entrance of his turgid member. He straddled her thighs and used the head of his penis to smear the lubricant around her opening. Nikki sighed and shuddered at the smooth, slick touch when it glided over her sensitive areas.

Unable to resist, Mark pressed downward and pushed back into her pussy. "Oh!" she grunted, "That's not my ass!" She was enjoying his unexpected invasion, which was obvious, given her response.

"Just getting a little more lube," he offered, tempted to remain and fuck her through his own release, but he also knew he may never get an offer like this again.

She snickered a little as he glided through her slick passage. "More lube, huh?"

"That's my story and I'm sticking to it." He pulled out and smeared her own lubrication on her asshole. "You ready?"

"So ready," she sighed.

"Okay, try to relax." She nodded as he pressed forward and down into her. She gasped before pushing out against him like she was trying to poop, as one of her friends had described to her after they had begun having anal sex. She was surprised to feel, without much pain, her brother's head expand her opening and sink into her.

"Oh, god," she whimpered. "Wait." He stopped. "Wow," she sighed.

"We don't—"

"I want to!" she argued, cutting him off. "I want this. Just takes some getting used to." Just then she felt some more lube drizzle into her crack and her brother gently massage it around her stretched opening. She liked it. It felt good: relaxing and arousing at once. Gradually, he slid in a little deeper and she groaned, only mildly uncomfortable. "Keep going," she said quietly. "Slowly."

Before long, Mark felt his balls settle against his sister's dripping pussy. "Holy fuck, Nik. That's all of it. You okay?"

"Yeah," she groaned. "Stretched full, burns a little, but it's kind of good."

He leaned down to almost lie on her back, and he kissed her cheek. "Your ass is so tight. I can't believe my dick is buried in you."

That sent a jolt through her. "You feel good," she sighed. "I like having you in me." She rolled her hips a little, her soft cheeks gliding across his skin and his dick stirring her insides.

Mark tingled at her effort. "Damn, Nik, you're so hot!" He withdrew a little and pressed back in smoothly. His sister gasped.

"Whoa. . ."

"That hurt?"

"No," she said with a smile. "It felt good actually." He did it again and her brow furrowed. "Fuck, that's good. It's like I can feel it in my pussy." She began to respond favorably and he took longer and longer strokes, still smooth. Her body began to respond on its own, and his dick was as hard as he could remember it being. "I feel every. . . ridge and vein and. . . [gasp] everything. Shit!" She could feel her orgasm building, surprising her. Mark was moving a little more quickly now, but still nowhere near aggressive.

"I'm getting close, Nik," Mark whispered. He continued to look down at his own shaft, slick and glossy, embraced by his sister's sphincter. He watched as his dick pulled it back and pushed it in while Nikki's painted fingernails dug into her own fleshy cheeks, exposing herself fully to his invading prick.

"Fill my ass up, Mark! Fuck, I can't believe Tim almost robbed me of this! FUCK!" she cried, releasing the pent up electricity in a burst. She cried out into the mattress, her ass clenching around a cock for the first anal orgasm of her life. She felt her pussy and ass spasm together, clenching and releasing, clenching, releasing.

At the same time, Mark's already girthy dick swelled and pulsed, his seed exploding in a flood of heat to rinse her bowels. His sister cried out again, her cries of passion blending with his own growls, a mix of staccato and legato vocalizations melding into a sweet symphony of passion.

Nikki quickly succumbed to the elated exhaustion following her climax and began to snicker in unbridled joy. "Wow," she breathed. She felt her brother's wilting cock slide from her backdoor and felt a thick rivulet of his still-hot semen pour over her pussy lips. Mark practically collapsed beside her, breathing heavily. He turned to look at her with a smile on his face.

"You are one sexy bitch," he laughed, "And a hell of a fuck."

His sister reached over and stroked his cheek with a smile, asking quietly, "Who are you calling a bitch?"

******

As Nikki peeled another waffle out of the waffle iron, Mark smiled at her and poured himself a cup of coffee. He had just ambled in, still looking like he had slept hard. Nikki was having trouble with the waffle because her other hand was holding her phone to her ear.

"It sounds like you had a good time," she said. After a pause, she laughed. "Eew! TMI! I mean, I know you're getting married and I everything, but I don't need to know EVERYthing you do!" She finally pulled the waffle free and set it on a plate. She poured some more batter into the waffle iron and closed it before setting the fresh waffle in front of her brother at the counter. She winked at him and mouthed "Thank you" with a smile.

"Actually, Mark and I went out last night," she told Lila. She mad a sad face at her brother. "Well, you know about me and Tim, but Becky and Mark broke up yesterday, too." Another pause. "I know! Me, too, but it's really complicated. Anyway, since we were both upset, we just went out drinking together and talked it out. . . Well, I didn't have to buy all my own drinks. . . Yes," she said, looking at Mark with a smile. "He was very cute. . . Don't worry, Mark got caught up talking with someone before I left, so he gave me the all-clear."

Mark stopped pouring syrup on his waffle and looked up at his sister, who was eyeing him intently as she spoke with her best friend.

"Oh, yeah, he was a great fuck. Big, passionate. . . I came a LOT. And by the way, that trick Sara told us about? It totally works." Mark could hear Lila laughing and calling his sister a whore. "I'm not a whore! Hey! If Tim had taken his time and worked with me, HE could be the one fucking my ass!" Mark tried to stifle a laugh, but didn't do very well. His sister was laughing quietly at Lila while putting her finger to her lips to shush her brother.

"I don't know. I got home late and haven't had a chance to talk to him about it. Judging by the look on his face this morning, I'd say he got lucky. In his defense, the way she was throwing herself at him, I don't see how he could resist. She was pretty hot."

Mark nodded and Nikki turned her back to him and stuck her ass out, wiggling it. She laughed as she turned back around to look her brother in the eye. "I don't know if I'll see him again. He has my number, but you know how that goes. But if he called and asked, I wouldn't tell him no."

She winked at Mark and he smiled, his groin tingling at the thought.