Becoming my Step-brother's Mistress

Chapter 12

"We'll get serious later," Autumn said, finishing her mother's sentence. Her robe fell open as she got on the other side of him, putting her hand on him as well, so they could jack him off simultaneously.

"I'm not sure I buy it. But keep going," Merlin said with a smile.

Autumn and Cara laughed. Merlin looked at them with suspicion again, but closed his eyes as he felt a pair of soft lips.

Cara was the first to place him into her mouth which annoyed or maybe disgusted Autumn more than a little by her facial expression.

Merlin didn't say anything, he just lay back and moaned as his stepmother gave him a long slow slurp in her mouth. She was able to fit more than Autumn ever had. She continued on him for about a minute, up and down.

"Your turn," she said, letting him go. Her daughter went down on him next. Autumn's large breasts hung out of her robe but stayed inside of her lacey black lingerie. She bit the tip of his c**k but without breaking the skin.

"Ahh f**k," Merlin said.

"Calm down you big baby," Autumn said, and then sucked one of his balls in her mouth while she stroked his c**k with the other.

Cara rubbed her hands under the crucifixes and across the muscles of her step-son's chest and down towards his abs. When her hand reached his belly button her lips kissed across his n****e.

He moaned and Cara smirked against his chest.

Autumn was sucking on one of his large egg shaped balls as she jacked his dark brown c**k off to the side.

"My turn," Cara said, putting her hand to the base of his d**k as she watched her daughter try and deep-throat her stepson.

"I could get used to this," Merlin said as his large d**k popped free from Autumn's plump lips.

Cara opened her mouth wide and engulfed his c**k, her teeth gently scraping the skin of his thick c**k because she couldn't open any wider. She was able to fit about two thirds of his length past her lips.

"Damn your Mom's real good at this," Merlin said.

"Shut-up," Autumn retorted. Although Cara wouldn't admit it, she appreciated the compliment. Autumn was no slouch either, but despite his massive d**k, Cara seemed to be able to handle it without as much effort. Cara attributed the difference to Autumn's lack of experience.

Cara pumped with her hand from the base, while going up and down over his shaft with her lips. She pulled the c**k from her mouth and licked around the head while she gave full strokes with both of her hands. She looked him in the eyes as she continued.

Autumn felt along Merlin's muscular torso, hardly an ounce off fat was on his chiseled abs and slim loins.

"Oh f**k yeah, that's good," he said. "You could learn a few things from your mother," Merlin said with a chuckle to Autumn.

"f**k you," she replied.. "Gimme that big thing."

Cara coughed after one last deepthroat. There was something about stuffing her step-son's c**k deep into her throat that always got her off. The warmth between her legs was stirring as she felt her p***y drip through her panties and then down her leg. She held his meat at the base and tilted it towards her daughter, as if to indicate she was handing it over. She was a bit worried they might be going too far.

"She's just trying to make you mad honey," Cara said.

Her daughter took a large breath and opened her mouth as wide as she could. She went down deep, maybe as far as Cara before she gagged.

"Nice, looks like we have a new champion," Merlin said. Autumn pulled back and gasped.

"I said, shut-up," she said with short breath. She held his balls in one hand squeezing them a bit as her other hand held the base of his d**k. This time she slowly eased her lips back and forth over his d**k. As she reached as deep as she could, her lips wrapped firmly around him and her hands pressed against his hips.

Despite being angry, Cara noticed that Autumn was really getting into it. She didn't want this to be a competition, but maybe just one more time...

"Ok, my turn," Cara said, almost too eagerly. Her face and chest were a little flush.

"No, I think he's had enough," Autumn replied as her lips came free and Cara took a hold of his c**k.

"Ready to ride the pony then?" Merlin said.

"No, we aren't doing that," Autumn retorted, as she stood up from the bed and wrapped the robe around herself again so her buddy was hidden behind the fabric.

"What next then?" Merlin asked.

"I guess Autumn's right, sorry Marley," Cara said, standing up and wiping the saliva from her lips with the back of her hand.

"When did you start calling him Marley?" Autumn asked with annoyance in her voice.

"Wait, so that's it?" He said with anger. "You just get me all hard and let me go? So that's what you plan was from the beginning? That's like torture," he said.

"You've been... a bit of a jerk," Cara said.

"More than a bit," Autumn replied. "You've been a bastard. And we're not letting you go."

"We're not?" Cara said.

"What the f**k? b***h, let me go," he said with anger.

"He obviously hasn't learned his lesson," Autumn said. 'He needs to sit and think about it, like a little boy on time out. Then after that he can go downstairs to his room without any desert."

"Seriously? We're not in some fuckin' boyfriend and girlfriend relationship that's all lovey dovey. It's just f*****g. You want me to be all romantic and s**t? What'd you expect? You should have gone to your boyfriend or husband if you wanted 'I Iove yous' and kisses."

"Let's go," Autumn said, moving from the bed.

"Ok," Cara replied softly.

"We'll come back in a few hours bro," Autumn said in a mocking tone.

"No, come back now and finish what you started," Merlin said with feigned authority, as he tested his muscular arms against the handcuffs. Despite their fuzzy 'novelty' appearance, they held fast.

"I don't think so," Autumn said defiantly.

"You just going to leave me here? Come on where are the keys Cara? Let me go," he said, pleading with her. His expression changed to a feeling of regret. His hard d**k was still sticking out, a bit wet from their recent fellatio.

"Keys," Autumn said, opening the drawer in the bedside table and picking them up. She placed them into her lingerie bra.

"Sorry Merlin," Cara said, looking at her daughter's firm resolve. He shook his head and his expression hardened again.

"Let's go do something fun," Autumn said. "You want to get mani-pedis?"

"That sounds good," Cara said with a smile.

"Are you serious?" Merlin said with an eye roll. "You have a time out," Autumn said with a grin.

"What about when someone else comes home?" he asked.

"No one else is coming to the house till tomorrow, remember?" Cara explained.

"Even Katherine? That nerd is always home," Merlin said.

"Don't call her that Merlin. She's with Habitat for Humanity in Sri Lanka until next weekend," Cara replied. By her tone she was clearly annoyed with him. Katherine was very studious, but Cara didn't like name calling. "You stay here until we come back.

"I'm not going anywhere," Merlin said. "So at least unlock one of my hands. I need to shoot my wad before I get blue balls."

Cara held up her hand, signaling that they were done talking as she left the room.

"Enjoy your blue balls," Autumn said with a smile as she followed her mother out.

"That went differently than I thought," Cara said as they went down the hallway towards the front door.

"Yeah," Autumn said with a laugh.

"Do you really want to get mani-pedis?" Cara asked. They stepped into master bedroom, on the other side of the living room.

"We could, but I was thinking...," Autumn said, as she opened the closet hidden in the wall. "Maybe we could see Grandma Addy?"

"Of course," she smiled. "That's a wonderful idea."

Autumn removed her robe and the key from her bra. Next she began undoing the black garters.

"Let me go get my phone to call her," her mother said. "I'm sure she'll be thrilled to see you."

"Ok. I'll get changed and meet you in the living room."

Grandma Addy was Cara's mother. Her full name was Adelia West, a second generation Swiss American that had moved to the United States with her parents for new job opportunities in the thirties. Her husband had died only a few years ago of renal failure. Lately she was having trouble remembering things. She had a caregiver visit her three times a week to ensure she was alright. Although she was on medication for ventral afibrillation it seemed like she needed an adjustment with the dose every month or so. Cara's mother never had been in the best health, but her husband had always taken care of her.

Cara talked to her mother Addy for a couple minutes, and confirmed she was free for lunch. After finishing the call, she waited patiently on the leather couch in the living room. She closed her eyes and breathed deep and slowly.

When Autumn had first confronted her with the knowledge that they were both sleeping with Merlin, she was initially a bit shocked. And then when she suggested they trap Merlin in handcuffs a few weeks ago, Cara's initial response was no, but she also felt like she needed to support her daughter's feelings. Autumn was really hurt when she found out they were both having s*x with Merlin. Her own guilt for him being her step-brother might have been a factor. Cara heard her daughter walk up, as the sound of heels clicked across the white floor.

"Ready to go?" Autumn asked.

"Yes," Cara said, opening her eyes and standing up. Autumn had donned a pretty white floral patterned dress, with short sleeves and a ruffled, knee-length, hemline.

They began walking down the hall past the bedrooms and towards the back of the house. As they approached the room that Merlin was in, Cara stopped. "You really want to just leave him here?" she was beginning to feel sorry for her stepson. She didn't think anyone deserved to be locked up like that.

"He's a prick Mom," she replied. "He called me a bitch."

"You are a b***h," he yelled from inside the room.

"See," she sighed. "Let's go."

"Alright," Cara agreed. They walked past the room. She glanced briefly inside. He was scowling angrily.

"Wait," Autumn said. She walked inside and draped a blanket over his lower torso. His c**k was still hard so it just made a tent.

"What's the point of that?" Merlin said.

"I'm tired of looking at it," Autumn said.

"You love it."

Autumn scoffed. As she closed the door behind her, Cara noticed Merlin was "flipping the bird" with both hands.

They walked to the end of the hall and then downstairs and through a door leading to the garage. The garage was big enough for four cars, but at that moment, there were only two, Merlin's apple red Civic and Cara's white Mercedes SUV.

They entered her car and began to back out of the garage and proceed down the driveway towards the front gate.