The three people paused in surprise as the door opened. John’s face became pale as he turned his head towards the door, standing completely naked in the dark room. Alicia was standing in the doorway facing the small, dark room, one hand still on the handle and her mouth open wide with surprise. The third person, a woman, was standing on her toes but bent at the waist. Alicia could see her completely naked figure as she tried to hide her face beneath a pile of dirty laundry.

“John!” Alicia yelled. “You couldn’t find another place to do this?”

Alicia's gaze fell on his hard manhood, which was still half-submerged into the body of the woman bent before him. She also noticed the glistening juice all over his shaft. Neither John nor the woman moved. They were so stunned that even the smallest movement seemed impossible for them. John kept looking at Alicia while the woman kept her head hidden beneath the soiled clothing. They hadn’t expected an intruder.

“I came here when I heard a sound,” she said. “I thought someone was in pain.”

“I can’t believe you’ve actually found a woman who would take that thing,” she grinned, pointing her finger at his thick, glistening cock.

The sound of Alicia's remarks was feeble in her own ears, as she knew John's cock was much bigger than her husband's.

“It never bothered you when we were young, and you just wanted to see me jerk off,” he laughed, trying to sound confident. “Am I correct, my dear sister?”

Alicia frowned at John. She didn’t want that unknown woman to find out that Alicia and John were siblings. It was true that her brother had never been hesitant about masturbation, even in front of her. She, on the other hand, had always enjoyed the show as an audience.

The mound of laundry began to move unexpectedly.

"Before you imagine anything else, let me tell you that we were young and curious," Alicia explained to the woman. "We have never done anything more than that."

Alicia turned around to make sure there was no one else in the basement hallway. Subconsciously, she took a few steps into the dark room and pulled the door halfway closed so that a little bit of light could enter the room. As she took a deep breath, the aroma of fresh cum and pussy-juice filled her nostrils. She was drawn to the scent and couldn't help but take another deep breath.

“You guys, better hurry,” she said, looking at her brother.

“We can’t finish until you leave,” he smirked.

“Yeah, yeah!” she exclaimed. “You don’t even need to tell me twice.”

Alicia turned to the door and opened it. She was about to step outside when she stopped for a moment and turned around to face them again.

"By the way, who is this slut you convinced to fuck in my laundry room?" she asked.

She noticed the muscles of that naked anonymous woman clenched, and her ass tightened.

Is she really a slut? She thought.

“Do you want to make a guess, Sis?” John chuckled.

The unknown woman grunted, as she didn’t want him to reveal her identity. Alicia had no idea who she was. She could be anyone who was known or unknown to her. Alicia took another look outside the dark room and made sure that the basement hallway was still empty. Nobody came down the stairs.

"The party is upstairs, and you're fucking over here!" she giggled. "Anyway, let's find out who she is."

“Not so soon, my dear sister,” he chuckled as he gently moved his hips, and his long, hard cock began to move in and out of that stranger woman’s pussy. The woman groaned from beneath the laundry. With every thrust from John, she moaned louder and louder.

Alicia’s eyes widened as she realized what her brother and the woman were doing. They didn't even care that she was just a few feet away from them. She noticed that the woman had a short height and thick calves. She had nicely shaped, curvy legs, small ankles, and feet. Her breasts were bigger and meatier, and they were jiggling with every thrust. She had dark areolas and erect nipples. Alicia walked closer to her brother to get a better look at the woman. She saw the woman had an almost flat stomach and a big, round butt. As she stood much closer to him, he accelerated his thrusts, making the woman grunt even more.

“She’s a bit older!” Alicia exclaimed.

“Why do you think that?” he smirked. “Can’t you see her voluptuous body and smooth, unblemished skin?”

“She has stretch marks on her stomach and thin lines beneath her breasts,” she pointed out. “Her hands are a bit older too.”

"She must have at least one child; she is someone's mother."

"All right, Sherlock!" John exclaimed. "You won."

"A divorced woman!" she wondered.

"Yeah," her brother said. "How did you come to know that?"

"She isn't wearing a wedding ring," Alicia chuckled, pointing to the woman's finger. "And most importantly, who would fuck a dickhead like you, John?"

The last sentence was meant to tease him with some sibling humor.

Both John and Alicia looked up. Since the party room was directly above the laundry room, the sound of people dancing on the hard floor caused a deep thumping sound.

“I’m going back upstairs, and you two finish your fuck session fast,” she ordered. “And don’t forget to lock the door.”

“Your laundry room doesn’t have a big lock, Sis,” John smirked, thrusting his hips vigorously against the large, round ass before him.

“I think I need to install a lock just in case you shag another old slut like her,” she winked.

"Well, until the next party, you can help me out!" he replied with a wink.

Alicia raised an eyebrow at her brother but said nothing. She checked the hallway again to make sure no one had come down yet.

John and his sister were close to each other. He knew her better than she knew herself. There were times when she stood in the doorway and watched her brother jerk off; however, nothing happened more than that. Although he had never seen her masturbate, he had done so for her pleasure, and nudity had never been an issue for them. Alicia, on the other hand, was always comfortable with the brazen attitude of her brother. When she was a virgin, she sat down on the edge of her brother’s bed and watched him cum in her panties. After seeing him jerk off, she rushed to her own room to quell the heat of passion between her legs. She stopped going to her brother's room to watch him masturbate when she started dating other boys in college.

“Why don't you stay in the laundry room and make sure no one interrupts us?" John said.

Alicia paused for a second. She gazed at the violent thrusts of her brother’s cock into the anonymous middle-aged woman’s wet cunt.

"If you hurry up, Bro," she continued, "I can stay."

“Anything worth doing is worth doing, right?” he chuckled.

Alicia looked him in the eyes. She remembered the last time he said the exact words. Years ago, John was masturbating for nearly twenty minutes while she stood completely naked before him. Her hands were clenched tightly together, preventing her from crossing the boundary. She had been powerless to leave as her younger brother ordered her to watch and wait until he shot his load.

“Do you remember, Sis?” he said, grasping the round butt before him and prying them roughly apart. “Do you remember when I told you how I’d fuck you if we ever did it?”

Alicia bit her bottom lip as she continued to stare into his eyes. She suddenly felt her legs tingle, reminding her of the horny virgin she used to be. She remembered all of those naughty things she and her brother had done. She couldn't help but respond with a short nod.

John grinned as he pounded the woman even harder than before. The woman began to grunt vulgarly into the soiled clothing.

"Do you remember how I got you on your knees?" he asked. "Do you remember how your big, sexy ass was facing me while I shoved your face into a pillow?"

Alicia tried to close her legs together, feeling her pussy become wet and start dripping. Her eyes widened, and her legs trembled more as she remembered the good old days.

“Do you remember this, Sis?”

John shifted his hand from the woman's smooth butt to her left ass cheek. She jerked violently and then groaned with pleasure beneath the pile of dirty laundry.

“Yes,” Alicia said in a soft voice.

Thousands of times, she wondered what might have happened if they hadn't had any boundaries. She had always squeezed her hands tightly whenever the place between her thighs became hot and filled with thick pussy-juice. She again felt like that naïve young girl who was standing there helpless as her brother pounded an unknown woman. That time it was different, though. Alicia wanted to be that woman feeling his aggressive thrusts into her own body. This time, she had no boundaries. She was waiting for her brother to ask once. After all, there was nothing they hadn't done in her fantasies.

“Your butt was always my favorite part, Sis,” he gasped, rubbing the ass cheeks of the woman.

She nodded. She could remember that her large, round ass was the prime attention for her brother. John’s finger moved in towards the crevice of the woman’s butt. The moment he rubbed his finger against her butthole, she contracted every muscle in her body that the siblings could see. Alicia stood there like a statue. She held her breath as the woman began to shake. It was the first time Alicia had witnessed another woman having an orgasm right in front of her eyes.

“That’s it!” John exclaimed. “Finish it, you slut!”

The anonymous woman began to shake uncontrollably, and waves of ecstasy poured through her body. John's cock had already stopped moving back and forth, but he kept his finger pressed inside her rectum. The woman screamed even louder, burying her face in the dirty clothing beneath her. Reluctantly, a soft moan escaped Alicia’s lips as she imagined herself enduring such a delicious orgasm from her brother’s thick cock.

“Aaahhh…!”

Alicia glanced at her brother when she heard him moaning. He took his finger out of the woman’s butthole, pulled his cock out of her cunt, and stroked it lightly. She felt like dropping helplessly to her knees at the sight of her brother's first ejaculate gushing out of the head of his big, circumcised cock. She felt like exploding as spurt after spurt shot out of him, leaving the pale, sweaty back and the big round ass of the woman a mess of pooled sperm. Alicia had always fantasized about these—staying full of sweat, kneeling before her brother, and savoring the last drop of his seed while dozens of people looked at them.

“Alicia, Sis?” John panted.

"Y-Yeah?" she stuttered. Her voice didn't sound the same as it had previously. It was low and throaty. John’s voice had taken her back from the fantasy world to the real world.

“Are you okay?” he asked, looking at her with a tired gaze.

“Y-Yep, I’m okay.”

“Give me your panties,” he said, extending his hand to her.

My panties? Why does he need my panties when he’s with another woman? Alicia wondered.

It was not something he was asking for the first time. She had given her panties to him before as well, but nothing more than that.

“Why do you need my panties?” she chuckled.

“Just give it to me!” he pleaded with his palm up, waiting.

Alicia pulled up her red party dress and grasped the sides of her matching panties with both of her delicate hands. She let out a sigh and slid them down to her ankles. She took a step back and picked up the discarded undergarment.

When John got his sister’s panties, he noticed that the crotch was already soaked in her cunt juice. He remembered how he used to jerk off in her panties while she stood in the doorway or sat on the edge of his bed and watched. Alicia stood, holding her breath, as she saw him sniffing her wet panties. John grinned as he gazed at her. He could see that she was a sexual wreck, and he could do anything to her right now. He turned his head away from her and looked at the older woman he was fucking. Her feet were on the cold floor, and her thick thighs trembled as she stayed bent over at the waist. He knew that the woman did not want Alicia to discover who she was.

How does she feel now after knowing of a brother and sister playing voyeur? Would she still stay hidden if she heard me asking my older, married sister for a blowjob? All sorts of thoughts ran through his head as he continued sniffing his sister's panties.

John reluctantly removed the panties from his nose and began to clean up the thick, sticky mess off the older woman's smooth, pale, and sweaty skin. Alicia, on the other hand, was watching intently with her body bowed at an angle as if he were pulling her with an invisible leash. He extended his hand towards his sister after cleaning his cum off the woman's back and ass.

“A woman shouldn’t stay without her panties at her own party,” he smirked. “You can put it back on.”

"Are you fucking kidding me?" she sneered. "You're telling me to wear the panties covered in your cum!"

He nodded.

“Come on, put it on,” he said, holding them in his hand.

Although Alicia didn’t want to wear them, she was too horny to think straight. With a trembling hand, she took her own cunt and his cum-soaked panties and began to slip over her bare feet and up her toned thighs. When she finally put them on, she felt the gooey mess all around her pussy and butt. She couldn’t help but feel her brother in her panties for the rest of the evening.

"Are you happy now?" she asked.

John nodded up and down.

"Now come back here before you go upstairs to the party," he said.

Alicia, with a somber face, took small steps towards her brother. As she stood right in front of him, he leaned forward and planted a sloppy kiss on his sister’s lips. It took her by surprise, but she didn’t move away.

"I liked the strawberry-flavored lipstick," he laughed as he licked his own lips after kissing. "You can now go upstairs, sis; we'll be there in a few minutes."

“But you haven’t said anything about who this old slut is!” she asked.

“Later, now go.”

John pointed his finger to the door of the laundry room. Alicia was upset not just because her brother had not told her about the unknown woman but also because he still stayed inside the boundaries, she had created years ago. Even though she was wearing her panties soaked in his cum, she knew he wouldn't quench the fire between her legs. She cursed herself again and again for not crossing the line earlier. Alicia wiped her tears and backed out of the room, almost tripping over the door frame on her way out of the tiny, shadowed laundry room. John closed the door as the sound of his sister's heels faded away.

"Alicia is gone, Mom," he muttered as he tapped the woman on the back. "You can come out now."

The middle-aged woman brushed the soiled clothing off her head and carefully straightened up. As she turned to face John, he noticed her cute, round face turned red and sweaty from being bent over for so long. That was the moment of truth when he finally learned how his mother really felt after learning about her two children’s forbidden relationship with each other. Janet placed her arms around her son's neck, bringing her lips closer to his. She gave him a long, wet, passionate kiss as her smooth pussy pressed against his semi-hard cock.

“It was fantastic, sweetie,” she said as she broke the kiss.

“I’m sorry, Mom,” he apologized. “It was not what I had planned.”

“No need to apologize, John,” she chuckled. “I enjoyed the risk of getting caught by my daughter while my son fucked me.”

As with Alicia, it had begun with nudity between John and his mother. Unlike his sister, there were no boundaries between the mother and her son. She used to enjoy watching him masturbate as well. John’s parents’ marriage was already on the rocks when, one day, he asked her to slip her hand between her thighs so that they could masturbate together. Since Janet has never refused her only son, she couldn’t say no that day as well. She was so turned on that she didn’t even try to resist.

“Have you had sex with your sister too?” she asked her son.

“No, Mom,” he replied. “Alicia and I never crossed the line she created.”

She grinned as she knew it was true.

"Your sister regrets it now," she said. "She was upset when she left the room."

"I know," he admitted. "But it was her fault."

"You should try to make her happy, too, sweetheart," Janet whispered, taking her mouth closer to his ears.

“Are you okay with this?” he asked.

She gave a nod and kissed him once more.

"Just remember that I need you, John!" she said with a smile. "Don't forget about me."

"Never, Mom," he assured her, squeezing the meaty ass so hard that she chuckled as her toes came off the floor, and she was forced to balance against her tall, attractive son.