Cassie stood at the precipice of her twin sister Sandra's bedroom, peering in through a crack in the door as Dean McCann held her sibling down, keeping her bent over the edge of the mattress. He pounded into her with powerful thrusts, the muscles in his ass contracting each time he drove his hips forward. She could hear the loud crack of Dean's thighs slapping against Sandra's bare ass, and it mixed harmoniously with the young redheaded woman's mewling, picking up in intensity as she grew ever closer to a climax.
Although Cassie could feel that the front of her panties were almost completely soaked through, she didn't dare risk touching herself while standing in the doorway. There was no telling how they might react if they heard her, and she didn't want them to halt their rigorous fucking. However, she did allow herself the slightest of pleasures as she tweaked her erect nipples through the thigh-length nightshirt she was wearing, biting her lip to prevent any noise from escaping her mouth.
Earlier that evening, Cassie and Sandra had gone out to the local club they frequented, which is where they ran into Dean. He had literally been the boy-next-door when they were growing up, but his parents had moved away after he went off to college, so they hadn't seen him in a long time. Dean had been a few grades above the twins back in high school, and when they were freshmen, they'd often spend their time after school watching him and the rest of the swim team practice.
Cassie had long harbored a crush on Dean, but Sandra was always apathetic about him. She preferred to go after football players, liking the bulky, muscular guys over the more slender and toned swimmers. If Cassie had been braver, she might've even gone through the entire team like her sister did for the football players. Unfortunately, she never got up the nerve to even approach him, let alone offer herself up as a team bonding exercise.
At the club that night, it was Sandra, not Cassie, who managed to catch Dean's eye. Despite being identical twins, Sandra always fared better when it came to boys. Part of that may have been their differences in apparel choices--Sandra usually wore something tight and skimpy, like the outfit she'd chosen to wear to the club.
It consisted of a short tan miniskirt that barely reached down past her ass, black plunging halter top showing off her bosom, a pair of fishnet stockings, and knee-high black high-heeled boots. Cassie, on the other hand, wore jeans, a loose-fitting t-shirt, and a pair of Uggs. Dean spotted the sisters first, weaving through the crowd to reach them.
"Cassie! Sandra!" he said loud enough for them to hear him over the cacophony of blaring bass, thumping drums, and chattering patrons. "Over here!"
The twins realized who he was and happily made their way to him. "Dean! I can't believe this! How are you?" Sandra asked.
"Pretty good," he replied. "You guys look amazing! Why don't you join me for a drink, so we can catch up. It's been ages since I've seen you."
Sandra cast a glance towards Cassie and shrugged. "Sure, why not?"
The three of them chatted about their lives since high school while throwing back shot after shot. Cassie, as usual, was being very quiet and shy, allowing her sister to do most of the talking. Therefore, it didn't come as much of a surprise when the increasingly intoxicated Dean soon zeroed in on Sandra, ignoring Cassie completely.
"Wanna dance?" he asked her.
"Okay, sure," Sandra answered. He got off his stool and offered her his hand. She stood up and took it, and he led her out onto the dance floor, leaving Cassie behind at the bar. Awkwardly, she twirled around in her seat, now all alone as she watched Sandra and Dean enter the frenzy of the rhythmic, pulsating mass of people using the music as an excuse to simulate getting intimate with one other.
There was a knot in Cassie's stomach as she watched her sister grinding against her longtime crush, undulating seductively, her limbs entwined with Dean's. Cassie could do nothing but look on enviously and continue to drink. At one point, she thought she saw Dean's hand beneath the front of Sandra's skirt, but with so many people dancing all around them, she couldn't be certain. By the time they returned to the bar, both of their skin was beaded with sweat, and they barely paid any attention to Cassie, instead devouring each other with their eyes.
When Sandra and Dean said they were ready to go, Cassie called for an Uber to pick them up outside the club. Dean was all over Sandra as they waited, standing behind her and wrapping his arms around her midsection as he peppered the side of her neck with kisses. When the car finally arrived, Sandra confusingly darted past Cassie, climbing into the backseat first, and leaving Cassie to get in after her. Dean entered last and pulled the car door closed.
Adding to Cassie's discomfort, Sandra decided that she didn't want to sit idly as their driver ferried them home. Since she had chosen not to sit in the middle, she leaned across Cassie so she could rub her hand over the bulge in Dean's pants. He was obviously very aroused by this, and ended up pulling out his cock, which Sandra proceeded to suck while stretched out over her sister until they arrived at the twins' apartment complex.
By the time the group made it into the apartment itself, Sandra and Dean wasted no time before clawing each other's clothes off. Cassie quickly relegated herself to her bedroom, but the torture of having to listen to the moans of ecstasy as Dean fucked her sister's brains out finally overwhelmed her, causing her to go take a look for herself at what was transpiring.
When Cassie first peered into Sandra's room, she was riding Dean in a reverse-cowgirl position, still wearing her fishnets and boots, but nothing else. This went on for a while, until Sandra popped off of Dean's rod, which Cassie could tell was glistening with her juices. He stood up and bent her over the bed, driving his cock into her swollen pussy. As he began to fuck her, he pushed her head down into the mattress, taking her hard from behind.
Cassie just stood there awestruck and watched them go, getting even more turned on while listening to her sister's muffled moans as Dean pummeled her cunt. Suddenly, he grabbed a tuft of her hair and tugged it, pulling her head back so her face free from the pillow, and allowing her cries to ring out across the entire apartment. Her face was twisted up in a look of unbridled carnal pleasure, and they both tensed up, ready to explode.
Cassie had never wished to be her sister as much as she did at that moment. She ached to feel Dean's massive cock deep inside her, taking him to the hilt. The couple bellowed in unison as they came at the same time, and a lump formed in Cassie's throat as she watched Sandra get filled to the brim with his seed. Realizing that they had finished fucking and might turn around, she hurried back to her room, not wanting to get caught peeping on them like a voyeur.
Once she was back in her bedroom, Cassie wasted no time in retrieving her favorite dildo from the bottom drawer of her nightstand. She rolled her damp panties off and kicked them aside, then splayed her legs wide open. Even though she was sopping wet, she still popped the dildo into her mouth, taking it all the way down to the base and letting it get coated in a thick layer of saliva.
Satisfied that it was now slick enough to slide into her pussy with each, Cassie proceeded to spit it back out and move it down between her legs, guiding it into her waiting hole. It spread her open as she worked it farther inside, and was soon slamming it in and out, fucking herself with the same vigorous thrusts she'd watched Dean give to her sister. She did her best to control the volume of her moans, but one or two slipped out before she could catch them. Still, she presumed Sandra and Dean were still too preoccupied with each other to notice. Cassie finally came, she came hard, and fell asleep soon after.
At around 3 AM, she decided to get up for a glass of water and a snack from the kitchen. She couldn't hear any noise from Sandra's room, so she didn't bother to put on any panties, leaving it to her nightshirt to cover her modesty. As she was bending over to check the lower shelf in the fridge for something to eat, she heard the toilet flush in the bathroom directly behind her, and a soon after, there was a pair of hands grasping her by the waist before she could react.
"Sorry if I woke you when I went to the bathroom," Dean said. Cassie was just about to respond when he added, "You know, Cassie's probably sound asleep by now. Why don't we have a little fun right here?"
One of Dean's hands moved down between Cassie's legs, and she felt his fingers trace her inner thigh on their way to her mound. She gasped as he pressed them inside her, needing to grab the sides of the fridge to steady herself. Just feeling his touch sent a bolt of electricity through her body, and she became light-headed, the room starting to spin around her. Dean pulled his digits back out and brought them to her mouth, making her suck her own juices off and getting them nice and wet.
