Becoming my Step-brother's Mistress

Chapter 3

"Don't you have trouble with s*x?" she asked finally.

"No, why?"

"Just because it's so... big, I wouldn't think it would fit."

"You don't know until you try," Merlin said as he grabbed her waist.

"I don't think so," she said, stepping back, and setting her hands on her hips. She was angry with his tone, but she hadn't noticed her robe had fallen open and her nightgown had ridden up. Merlin looked down at her crotch where he could clearly see the wetness of her white panties in the light of the refrigerator.

With a smile he put his fingers between her legs, pressing against her panties and wet p***y as she gasped in shock. When he pulled his fingers back, he pressed them to his nose and smelled deeply with a wide smile.

"You're really fuckin' wet for someone not interested," he said walking closer to her. She backed into the kitchen bar, and as he continued towards her, she collapsed backward onto it with a small thud.

"That doesn't mean I... I... I-" she began.

He pushed her panties to the side and held his d**k against her cleanly shaved p***y lips with his other hand.

"Take a deep breath," he said.

She instinctively did as she was told, but when she felt his thick c**k begin to push pass her p***y lips she cried out.

"Ah-," she said as the large tip began to penetrate her. Even with the generous amount of slick juice flowing from her p***y, it was very tight.

"Oh god- ow..." she exclaimed. The two kept their eyes focused on the long d**k that was pushing into her. "Oh s**t it's too big!" she said, as she pressed her hands to his hips, but he quickly pushed them away.

"No hands." He rocked his hips back and forth a few times, pushing in a little deeper with each thrust as her face became flush. His d**k looked thicker than her wrist and continued to stretch her open. Her upper torso felt hot when the tip of his c**k finally brushed against her cervix and hit the back wall of her p***y, filling her completely.

"Oh... oh my god!" she cried.

"Not so loud," he said. He pulled his hips back and forth, his thick c**k spreading her tight p***y. As her white cream spread across his d**k, her eyes rolled back and she cried out in ecstasy. Merlin was quick to cover her mouth.

"f**k, you're gonna wake Mom and Dad," he said with his hand firmly over her mouth. She writhed beneath him, her orgasm causing her to shake. He kept his c**k deep inside of her, and when he removed his hand, after the final throes of her minutes long orgasm, she laughed breathlessly.

"Damn girl you enjoying yourself?" he asked.

"Oh... my god, I- I've never c*m that fast before," she laughed softly. She saw the shine from Merlin's smile as he began grinding into her. His c**k kept brushing against her back wall.

"Owie, I think that's as far as it will go," she cried, as she looked down towards his grinding pelvis. She felt completely filled. It felt amazing, but it hurt a little when he tried to get more inside.

He gave a few hard slaps to each of her butt cheeks.

"Ow," she said after each one. "Don't."

"f**k, I've been waiting to do that since I saw this sexy ass," he chuckled, giving it another slap.

"Oh!" she cried as he buried his d**k deep inside her again. Her p***y was covering his d**k with thick white cream as he ground into her. She could feel another orgasm mounting, and as it rose like the crest of an ocean wave, her breathing quickened and her moans became even louder. Autumn was feeling so wet and warm between her legs as her p***y throbbed in pleasure. When she reached her climax she was about to scream in extacy, but Merlin held her mouth again, as he swore at her for being so loud. Her entire body was gyrating. She had never come so hard before.

"Oh my god," she moaned as he removed his hand from her lips.

"Damn girl, you're so f*****g tight," Merlin swore between clenched teeth.

"Oh my god," she said over and over, the pleasure from between her legs still echoing through her body. Merlin pulled his d**k free from her dripping snatch, and pulled her forward off the kitchen bar.

"Come on girl, get on the ground."

"Uh?" Autumn said dubiously as she got onto her knees in front of her tall stepbrother.

"Nah, lay back," he said. "And take this off," Merlin took off her robe and nightgown, and set them down on the floor. She laid her back onto the robe.

"Damn look at these huge t**s," Merlin exclaimed, grabbing her breasts over her bra. "Take this off too," he said, pushing the underwire cups down. Her cigarette and lighter popped out, falling to the ground.

"Huh what's that?" he exclaimed.

"Oh I.."

"Damn big t**s," he said grabbing her breasts again and licking over their top surface. He ignored the cigarette and lighter, in favor of her large breasts.

"Ahh..," she moaned, as she arched her back to release the clasp for the bra. He pulled off her bra and threw it to the side. Autumn sighed, her heavy breasts free and her n*****s, the size of pencil eraser, hard and at the ready.

"Let's go again," he said as he lifted her knees, spreading her legs wide. "I haven't nutted yet."

"Oh god," she gasped as he pressed his d**k into her p***y quickly, expanding her love canal completely.

"f**k," Merlin growled.

"Oh my god," she exclaimed as she felt stretched like never before. And although it still didn't fit completely inside of her, his c**k felt amazing, the gentle curve of it brushing against her g-spot. As he stroked his d**k back and forth she began to moan softly.

"Oh yes... oh my..."

Merlin began to breathe quickly as he began pumping Autumn faster. It got to the point that he was making long fast strokes inside her. She would moan loudly with each pump from his big brown c**k. She opened her eyes and saw how the light from the refrigerator hit his chiseled muscular abs with a trail of hair leading down to his big d**k that pounded into her p***y relentlessly.

"Ah, f**k," Merlin said with a grimace. "p***y's too good."

"Oh... uh," Autumn moaned. She felt like another orgasm was edging closer as Merlin pulled his d**k out and slapped the tip up and down right on her clit. "Uh, don't stop," she pleaded.

"Ride me," he said, as he laid down on the tile floor. Autumn breathed in, sitting up and looking down at Merlin's body. His muscles were glistening with sweat and his wide chest rose and fell slowly as she straddled him.

"No the other way, I want to see that ass."

"What? No..." Autumn blushed.

"Come on girl, turn around, let me see that beautiful white ass," he grinned.

She hesitated and then rotated. It had been longer than she could remember that she had had an orgasm with her boyfriend (never multiple), and she felt that she was so close to another. She crouched over his legs, she looked down to his cockhead.

"Sit on it," He ordered.

Merlin held his c**k up to her p***y and as she sat down on the head, her brow furrowed. She swore as he entered her.

"Nice," Merlin said with a slap to her butt. Autumn moaned each time he slapped her apple shaped bottom.

Her hands went down in front of her for support, being careful not to sink too far down his c**k, as she was afraid it could hurt if he went too deep. She slowly bobbed her hips up and down over his d**k.

"f**k. Oh yeah girl, ride that d**k good," he said. She could feel his hands on her butt, squeezing as she went up and down on his c**k.

She felt an orgasm approaching again, but the change in rhythm had slowed it. She was moaning and groaning as his d**k penetrated deep inside of her.

"Damn girl, you love that brown d**k huh?"

"Oh!" she cried, as he suddenly thrust up into her. "Not so deep," she warned.

Her hips felt weak as she continued on top of him and she began to sweat.

"Lean back," he suggested.

She followed his instructions putting her hands back to support herself.

They continued for a few minutes in that position until Merlin grabbed Autumn's hips and asked her to flip around. She stood up and his heavy c**k fell back against his muscular abs with a wet smacking sound.

Autumn turned to face Merlin and for the first time really looked into his eyes as their bodies were coupled. The curve of his d**k rubbed perfectly against her g-spot spot as it entered.

"Yes, right there," she cried, the amazing feeling in her p***y growing as he thrust.

"Yeah girl, get it," Merlin growled. He slowed and then held her hips as he ground his d**k into her.

"MMmmm," she moaned, biting her lower lip as she leaned forward, supporting herself on her hands against his wide muscular chest.

"f**k," Merlin growled.

"Oh my god," she exclaimed. It felt like he was reaching deeper than before. She could feel her face becoming hot again.

"Yes, yes..." she moaned.

Merlin began pumping into Autumn faster, harder than she thought possible, but without hurting her. A deep ache in her loins was stirring. She could feel another orgasm coming, but this one was different, more heated, and stronger. She felt that ache grow, but while on the verge of completion, Merlin's voice broke the sound of wet smacks, panting and moans.

"s**t, I'm ready to cum."

"Wait," she panted, nearly breathless. It was going to be amazing, she knew it was going to be an even bigger orgassm than before, and she really needed it, she thought to herself.

"I'm gonna c*m now, you better-" he said.

"Bastard, just wait, I'm- almost there," she cut him off, in annoyance, as his c**k continued it's path back and forth along her g-spot. She didn't want it to stop.

Suddenly the ache turned into a s****l explosion as a huge sensation overcame her. Her entire p***y quaked and throbbed over Merlin's d**k as the biggest orgasm she had ever felt in her entire life rocked her body. Her lips parted as she gasped, her eyes rolled back into her head, and she kept riding him as if possessed.

"Goddamn it, b***h. It's too late, I'm coming inside. You're f*****g squeezing too hard," he swore.

She felt the first burst of his baby batter, deep inside as he held her tightly against him, but she was still bouncing on top of him as if in a trance. Finally her eyes cleared.

"Oh my god," Autumn moaned, her vision was a little blurry and she was still cumming, her p***y contracting on Merlin's big d**k which was coming inside of her. "Don't come inside," she said, as if her response was somehow delayed in time.

"It's too late," he said between grit teeth, holding her tightly. She couldn't be sure, but it felt like his d**k was pressed against her cervix, injecting his thick c*m straight into her womb, as her p***y kept squeezing, milking his d**k of all it's white juices.

"You bastard," she said pushing against his chest.

His d**k was throbbing for what seemed like a whole minute, each burst of semen, shot into her until his thrusts finally slowed.

Autumn panted as Merlin slowly pulled his d**k free. The big d**k flopped out, a bit of c*m oozing from his p***s.

"Damn girl, you squeezed it out of me."

She silently fumed, it felt almost hot between her legs. She sat up and looked down. Her boyfriend would be so furious if he saw her now, she imagined, as she felt her Brazilian stepbrother's thick c*m ooze out of her p***y and onto her satin robe.

They looked at each other silently except for their heavy breathing. Autumn's eyes kept lingering on his c**k. She still had a hard time believing she was able to fit it inside of her.

"How about that cig now?" Merlin said. He grabbed the cigarette that had fallen from her bra and put it between his lips before flipping open Autumn's lighter. As he lit the cigarette he inhaled and then pulled it from his lips.

"Mom would be pissed if she knew you were smoking in here," Autumn said with heavy breaths.

Merlin laughed as she handed it back.

"What's so funny?" she asked.

"That's what she would be pissed about?"

He exhaled a thick plume of smoke before handing it to Autumn. She looked at it between his fingers for a second with a sigh, before taking it. After she took a drag and exhaled the smoke, she stood as well. The c*m began to slide down her leg. She set the cigarette down on the granite countertop and grabbed a kitchen towel.

"s**t it's oozing out," she swore. She held the blue scale pattern towel up to her p***y, catching as much of the c*m as she could.

Merlin picked up the cigarette again and took a few puffs while Autumn picked up her bra and her robe shirt.

"f**k its late. I'm beat," he said, setting the cigarette on the counter and walking out of the kitchen.

Autumn swore as she cleaned up the kitchen, before she closed the refrigerator door. She put out the cigarette in the trash between some mashed potatoes. Then she took her robe and the kitchen towel (both stained with c*m and p***y juice) to the bathroom where she ran them under water while she peed over the toilet for about five minutes trying to get out all of Merlin's semen. She finally decided to go to bed, she didn't want to take a shower and wake up her entire family.

She hung her robe and towel in the bathroom to dry and tried to walk quietly up the squeaky stairs.

She opened the bedroom door slowly and walking around her brother snoring and got into bed. She was so tired, but she could still feel some of her stepbrother's c*m inside and her p***y pulsing gently as she fell asleep.