2T4U/Confront Brittany about the pictures you saw earlier
With a head full of steam and your cock fully errect pointing agressively down your pant leg, you proceed through the unlocked patio door and straight into the incredibly erotic scene playing out in the living room, stopping just behind Brittany where she is knelt on the floor with her head buried obvliviously between Leah's legs. The little 10 year old minx sat there quivering, eyes closed with her arms wrapped desperately around her sisters neck, pulling her tightly against her tiny bald pussy. Neither had noticed you enter and you stood there a moment drinking in the sight, Leah whimpering and wriggling beneath her sister's tongue as Brittany's hand fervently worked at her own pussy letting out long, hungry moans.
"Oh hi 'Molly' " you said, in a half whisper. Leah's eyes shot open, first locking on the the raging bulge in your pants and then flicking up to meet your lusty gaze with shock and confusion displayed on her face.
"Who's Molly?" Leah asked with her head cocked slightly to the left and her cheeks flush with the embarrasment of being caught. Hearing this name uttered as a question surprised Brittany out of her distracted state and her head swivelled rapidly around to see who Leah was speaking to. As she pulled her face away you got a full and clear display of Leahs swollen, slightly parted, glistening pussy and Brittany's mouth cheeks and chin was coated with a mixture of spit and little girl juices.
"What the FUCK" She half yells at you, narrowing her eyes and obviously on guard about being caught. However your eyes cannot hide the burning desire behind them, nor can your pants and as her eyes meet yours she gazes up at you fully naked in front of her little sisters splayed pussy and gives a sly half smile and an intense smouldering expression. "How do you know about 'Molly'?" she asked.
During heated moments in the past Brittany and Jack had shared some of their darker desires with eachother and while both had expressed an interest in children, Jack had just assumed these were just fantasies. To have seen her earlier today in pictures and again now on full display engaged in the forbidden fruits was incredibly shocking and exciting and amazing. "You know those links you visited on my computer?" Jack questioned. "Well let's just say I went down the rabbithole this morning. I saw those messages you were sent after your last 'live performance'. More specifically, I saw the pictures".
Her eyes widened and at first she thought to deny or defend herself, but then she thought, 'So what'. 'here he is with a raging hardon and he thinks he's going to lecture me about what I do with my pussy!. She gives a challenging expression, "So what" she says as she inserts a finger into Leahs tiny opening, "You see that? That's MY pussy and I can do what I want with it. She needed to learn sometime and the last time you sucked on my clit while I fantasized about fucking children, I thought, who better than me!". You know from experience that Brittany's bossy, demanding nature was very clearly in control while her pussy was making the decisions for her. "And if I want to make a little money on the side, it just means I'm enterprising"
Despite the dirty things you'd seen her do, Leah was still blisfully unaware about many of the naughty things that could be done to her. Her eyes widened and brow furrowed showing concern as she now made eye contact the third leg trying yearning desperately to be released from your pants. The entire situation was just so fucking hot that you no longer cared about the fact she'd displayed herself to random strangers on the internet and instead were turned on remembering the image of her cumming on little Leah's face! Imagining the nasty things they'd done between images as you stood there staring at Britt's finger pistoning smoothly in and out of her immature cunt.
Brittany stood up and walked over beside Jack, rubbing at the painful lump between his legs. "You know" she half whispered, "It's actually a good thing you showed up. I'd about run out of things to teach here. But now that you're here, we can start the real lesson!" With that she turned, sat back down on the couch next to the nubile flesh that was the object of both your lust.