After what had happened a week ago, Sandy was finding it hard to look at her two kids the same way. While her husband had been away on one of his regular business trips, she had been caught by her son as she masturbated on the couch, after convincing him to join her, Casey, her daughter had also come home. She had also joined. The three of them had agreed not to tell Tom, her husband.

Every time Tracy thought about that night, a blush spread across her cheeks along with the feeling of lust-filled arousal, still not believing what had taken place.

Unfortunately, Tom had returned early the next morning from his business trip and she hadn’t been able to follow up on her actions. But tonight he was finally going away again, just hours away from leaving.

Thinking back on the way their three bodies had been entwined she felt a small smile creep across her face. Neither of the kids had mentioned what had happened so far, her husband always having been lurking nearby, but now that her husband was once more away, she wanted to play again.

***

Casey and Harry are walking home together, Harry having gotten off at the bus stop first then waiting for his sister. They both walk in silence for a while.

“Dad’s going away again tonight,” Casey says softly, breaking the silence.

“Yeah,” Harry responds, a smile touching his lips. He and his sister had talked about their night with their mother a few times now, speculating about if it would happen again.

“Think Mum’s gonna do anything?” Casey asks her brother, a small blush creeping across her cheeks as she feels herself moisten at the thought.

“I dunno... maybe,” says Harry. He pauses a while. “Though... even if she doesn’t... we could always...” Harry leaves the unspoken suggestion hanging in the air, feeling his cock twitch at the possibility of a hot session with his sexy sister.

Casey stays silent for a moment letting her imagination run wild, the dampness between her legs under her skirt moistening further.

“I’d like that...” she whispers softly.

“Me too,” says her brother under his breath.

Nothing more is said on the topic as the two of them walk up the front driveway, both pairs of eyes flickering to the Blue Hyundai still sitting in the driveway.

“Hey Mum, hey Dad, we’re home!” Harry calls out as the two of them step into the house, dumping their bags and shoes at the front door.

“Oh, hey kids,” Tom says as he hurls a large worn suitcase down the stairs. “I was just heading off, hoped I’d catch you before I left.”

“How long are you gone for this time dad?” asks Casey giving him a goodbye hug as he reaches the bottom of the stairs.

“Um, it’s a long one this time, two weeks, they’re sending me to Canada this time.”

“Canada? Wow... Well see you when you get back I suppose, stay safe okay?” Harry says as he hugs his dad goodbye too.

“Will do, now where’s your mother?”

“I’m here!” says Tracy in a sing song voice. “Have a lovely trip dear, let me know when you arrive safely okay?”

Tracy kisses her husband goodbye and the three of them watch as he stalks to the car with his suitcase, and throwing it in the back, pulls out of the driveway.

As soon as he is gone, the tension between the three of them rises as they stand there looking at one another.

Feeling awkward Tracy walks back to the kitchen to prepare dinner as she thinks up naughty scenarios she can force upon her kids.

Casey and Harry look at each other with raised eyebrows as their mum walks away from them, not having said a word. Harry shrugs and the two of them head to their rooms with their bags.

Walking down the hall, Casey knocks on her brother’s door. Almost immediately he opens it, as if waiting for her. He has changed out of his earlier clothes and now stands in just a pair of loose shorts, his toned upper body in full view.

Casey feels the arousal from before well up inside her once more as she admires her brother’s body. They lock eyes for a moment and Harry steps aside to allow his sister in. Closing the door after her, Harry watches his sister as she walks to his bed and sits down on it, a look of nervous desire on her face.

Walking over to her, he leans down pressing his lips softly to her supple lips. Shocked but not against it, Casey kisses him back, letting her mouth open giving access to his tongue. They stay like this for a while as their tongues explore each other’s mouths and their breathing becomes harsher as their heartbeats accelerate.

They hadn’t been game to do anything while their father was still here, but they had spent most of their nights instant messaging each other from their separate rooms, talking about what they would like to do to each other.

Breaking out of their passionate kiss, Harry begins to lift Casey’s shirt over her head. Once it is on the floor he turns back to her and trails kisses down her neck sucking softly on her fair skin. Casey lets out a moan and reaches behind her to undo her bra, which Harry helps her out of as his kisses leave a hot trail on her skin, leading towards her pert left nipple.

Harry pushes Casey back onto the bed so that she is laying down and crawls on top of her, his mouth going straight back to her nipple. He sucks on it gently and as she moans, starts to tease her other nipple with his hand. Grazing his teeth against the tender flesh of her nipple, he runs his other hand down her body to her skirt.

Casey squirms in pleasure as her brother sucks and teases her nipples and slips a hand up under her skirt to her bare pussy. Harry smiles against her nipple as he realises that she came in here without her panties on.

Feeling her brother’s finger push up into her wet pussy, Casey lets out a satisfactory moan. Harry begins to finger his sister relentlessly as he kisses his way back up to her mouth. Their tongues combine again as Casey squirms underneath her brothers expert touch.

Harry can feel himself fully erect now, gaining much more pleasure from fingering his sister than he thought he would. He draws his finger out of her and begins to tease her clit making her gasp and squirm, breaking the contact between their mouths.

Harry grinds his erection against his sister’s leg as he pushes two fingers back into her now soaking pussy.

Casey wraps her arms around her brother’s neck and pulls his lips to hers again, thrusting her hips up to meet his hand as he swirls his fingers around inside of her. Their breathing is ragged as their tongues once again wrap around each other’s in a passionate lust filled kiss.

***

Unaware to what is happening upstairs, Sandy finishes dinner and starts to serve up. After the table is set, and the dinner is on the table, she treks upstairs to get the kids. Naughty fantasies are still swirling around her head as she reaches Casey’s room. She knocks. There is no answer. She knocks again, still no answer.

Opening the door, Sandy finds her daughter’s room empty. Confused she heads to Harry’s room. She stands in the doorway about to knock when she hears Casey moan.

“Oh, Case,” comes Harry’s voice, dripping with lust. “Fuck, you are so beautiful when you are like this. It was so hard to wait until dad left. I’ve wanted to fuck you again, ever since that night.”

Sandy pauses her eyes widening in shock. Her kids were fucking again! Without her! She is about to raise her hand to knock when Casey’s voice stops her.

“I’ve always imagined this, Harry,” she says between moans. “I have always wondered what it would be like to be with you, I was always so jealous of your girlfriends, always wanting to know what it felt to have your cock buried in my pussy.”

“Case... Me too, all those boyfriends... I know its wrong... I know you’re my sister, but I always wondered.”

Sandy opens the door a crack as Casey moans again loudly. Surprisingly neither of them notice. Sandy pokes her head around the door and feels herself get instantly wet. From her view at the door, she can see Casey's spread legs as her brother fingers her with two fingers furiously. They have stopped talking now and Harry is lying on top of her as they kiss.

Wondering if she should walk in and join Sandy can’t help but rub herself through the fabric between her legs. Seeing her son fingering his sister was just as much of a turn on as was watching them fuck at her command.

Sandy is about to walk in when Harry hisses, “Oh god, Case, I need to be inside you! Right now!”

Sandy watches as Harry pulls down his pants, setting his raging cock free. She decides to leave them be for tonight and just watch instead as she strokes her moistening pussy through the fabric of her panties and jeans. She’d make sure to punish them tomorrow night after school.

***

Harry lets out a long low moan as his cock enters his sister’s pussy, his body raging with feral desire. He starts to move in and out of her, slowly at first then gaining momentum. Casey moans and digs her nails into his bare back making him fuck her harder, another moan escaping his lips.

Casey closes her eyes in pleasure and wraps her legs around her brother’s waist trying to feel his cock deeper inside of her. They both moan together as they fuck.

Harry’s eyes roll back in his head as he feels his climax coming and pounds his sister’s pussy harder than ever.

“Fuck, Case, I’m gonna come,” he moans.

“Come inside me, Harry,” she moans back as she feels her own orgasm start to rise.

***

Sandy’s breathing is coming heavy and ragged now as she watches her children climax together, both screaming out in pleasure. She watches as Casey’s body tenses up and Harry’s thrusting stills. When she sees Harry collapse on his sister, Sandy pulls back from the door and creeps away. She would have to replay what she had just witnessed later tonight when she goes to bed and fuck herself until she comes.

Pausing at the bottom of the stairs, she calls up to them,

“Kids! Dinner’s on the table!”

“Coming!” They both yell down to her, completely oblivious to the fact that their mother had just been watching them.

***

Sandy and her two children eat their dinner in silence, Harry and Casey exchanging subtle looks across the table. Eventually Sandy puts her cutlery down and clears her voice. The two look at her curiously.

“I know what you were doing just before I called you down here,” she says.

Casey and Harry look at each other in shock.

“What are you talking about, Mum? I was just checking my email,” says Casey with a nervous laugh.

“No you weren’t, you two were fucking, and don’t lie to me, I saw you,” Sandy responds curtly.

Harry and Casey both go pale as they look at their mum in horror.

“It was a very hot display,” she continues.

At this, Harry and Casey exchange knowing glances, they weren’t the only ones thinking about that other night. Their mum wanted a repeat of their adventures too.

“Mum...” Harry starts. “We weren’t sure if...”

“Stop,” she cuts him off. “I’m not done yet.”

She waits until she feels certain neither of them will interrupt her.

“It was a very hot display,” she repeats. “But, it was against the rules.”

“Rules?” asks Casey confused.

“Yes, rules...” their mother responds. “My rules, and as punishment I expect you both to come home straight after school tomorrow, have your showers early, strip yourself completely naked and wait in your rooms on your bed until I come for you.”

“Mum...?” Harry asks slowly as it dawns on him what she is saying.

“Yes Harry, I am going to dominate the both of you, from now on whenever your father is not around you must call me master and only do what I say you are allowed to do. When you behave I will give you points, once you have ten each, you may have a night to yourselves.”

Sandy had had a lot of time to think about these rules as she had cooked dinner and she felt quite pleased with the result. She looks between her two children, met by looks of amazement.

“Is that understood?” she asks when they don’t say anything.

“Uhh… Yes mum,” Casey responds still a little in shock, but also feeling aroused at the whole idea.

“Yes...” Harry says with a similar reaction to his sister.

“Yes what....” Sandy says with a smirk.

“Yes, Master,” they both chime obediently.

************************************************

If this one is just as popular as the last, I will continue with the series.

xxx Teila