After Sheldon and Missy's initial sexual experience, the two of them had begun doing it more and more often, sometimes experimenting with what Missy read in magazines. They usually did this at night after the rest of their family had gone to bed for the night. Such experiments included kissing different parts of each other's bodies and rubbing each other to find what turned each other on the most. Of course, every test always ended with them becoming so excited that they couldn't hold back, and they would end up covered in each other's cum. Doing this so often became an addiction; so much so that, one day, they threw all caution to the wind.
Missy and Sheldon were quietly reading in their room one afternoon, their parents were out for the day, and their brother, Georgie, was busy watching TV. Missy sat up on her bed, magazine in hand, and turned towards Sheldon, who had his nose buried in a new comic book. "Sheldon, take a look at this." said Missy, turning the magazine so Sheldon could see. He carefully closed his comic book, sat up, and turned to see what she was so excited about. The pages of the magazine contained a picture of two people; a woman on top of a man, who appeared to be sitting on his face, while putting her mouth on his penis. "What is this?" asked Sheldon. Missy looked at him with a slight blush to her face, "It's a position where both people are able to have their crotches kissed, licked, sucked, whatever, without having to take turns. Sheldon analyzed the picture trying to imagine how it would be done. Once he got it down, he asked, "Okay then, when should we try it out?" Missy smirked at him, "Why not now?" Sheldon was surprised, considering the time of day, and, therefore, possible dangers. "What if we get caught?" said Sheldon. "We won't", responded Missy, with confidence, "Mom and Dad are both out, and Georgie's glued to the TV. We have nothing to worry about." After considering the odds, Sheldon conceded, "Fine, but let's make it quick." "Yes!" cheered Missy, jumping off her bed and undoing the buckles of her overalls.
Missy quickly pulled her overalls down to her knees, and then off completely. Sheldon noticed Missy's butt and crotch were bare, despite only having her overalls removed. "Where are your panties?" Sheldon inquired. Missy looked down and giggled, "Oh, I like how the air feels against my crotch, so I'm not going to wear any for a bit. Plus, it gives easier access for this." As Missy pulled her shirt off, Sheldon felt his penis begin to stress against his pants. Now that she was completely naked, she leapt onto Sheldon's bed, saying, "Hurry, Sheldon, I can't wait much longer." Sheldon looked at her and noticed her crotch was shiny, wet from her excitement. He began to strip, pulling his shirt off over his head. Becoming impatient, she grabbed his pants and briefs, and pulled them both off in one tug. With that, both were sitting on Sheldon's bed, butt naked, ready to go at it again.
Remembering the picture in the magazine, Sheldon laid back with his head on his pillow, and Missy climbed on top of him. Staring face to face, Missy asked, "You ready?" Sheldon nodded and Missy turned around, straddling his neck, putting her butt in his face. Sheldon was pleased with the view, saying, "I can't believe we didn't think of this before. This is far more efficient than the usual method." Missy looked back at him, "Well, not having to do anything while you lick me is pretty nice." She turned back and grabbed Sheldon's penis. Feeling this, he put his hands on top of Missy's butt and pulled it towards his face, preparing to start.
Missy took a lick of Sheldon's penis to get it completely hard, and said, "Okay, start." She put her mouth around it and began sucking, moving her tongue around the head and shaft, while holding his balls with her right hand. The sudden jolt of pleasure made Sheldon forget for a second that he also had a part in this, but Missy was sure to remind him. "Hey! Are you forgetting something?" He quickly snapped back to reality and shoved his face into her butt crack, as to avoid punishment. He stuck his tongue out, but still slightly hazy, put it straight into her anus. Retracting just as quickly as he went in, Missy laughed, and attempted to speak, but her mouth was still filled of dick, "That's what you get for getting distracted." Entering carefully this time, he made sure to put his tongue to the other hole, which was now slightly dripping from anticipation.
Sheldon's nose was still poking at her anus, but, at least, he couldn't taste it anymore. He gave Missy's crotch a long lick, tasting her wetness, causing her to shudder and moan, bringing her head up off of his penis. "Dammit, Sheldon, stop teasing and put it in!" she ordered. Happy to oblige, Sheldon spread Missy's folds and put his mouth to her hole, sliding his tongue inside. This caused Missy to tense up for a moment, gasping for air. Once she recovered, she said, "Finally! Now I can really go at it." Missy took Sheldon's penis in both hands and shoved it into her mouth, putting it so far back that Sheldon could feel her uvula against it. Every breath and every swallow enhanced the experience, causing him to moan into Missy's hole as he moved his tongue around, swirling her insides. Missy pulled his penis out of her mouth up until the head, and then shoved it back in, over and over, while Sheldon began rubbing Missy's crotch and butt crack, adding to her arousal.
After a few minutes, both kids began to feel the all too familiar pressure building. Missy squealed as she squirted her cum onto Sheldon's face. Mere moments later, Sheldon grabbed her butt as he came into Missy's mouth. Once both of their orgasms had calmed down, they removed their mouths from each other's crotches, the slightest bit of cum dripping from Missy. Still sitting on Sheldon, she scooted down to his stomach, leaving a trail of cum along him, and turned around. Looking at him, she opened her mouth and stuck out her tongue, attempting to speak, "Look how much you came!" Missy's entire mouth was covered in Sheldon's cum, which grossed out Sheldon. "Would you swallow that?" he asked. Immediately, Missy got it all down in one gulp.
Missy laid down on Sheldon's chest, putting her arms around him. "You know", she said, "We do have some time left." Sheldon was immediately pulled out of his post- sex haze, trying to imagine doing it again so soon after, especially with the increased potential of getting caught. "But, we've never done it twice in a row. I don't know if I have the energy." Missy looked at him with a smile, "Sure you do." Sheldon was still worried, but could hear that the TV was on. "Fine, but no "foreplay". We're just going to do it and be done." Missy nodded in understanding. She scooted off of him, rubbing her crotch against his, making him erect again.
Missy laid down with her head on the pillows and spread her legs. Sheldon got into position and immediately shoved all the way into Missy's still- wet hole. The sudden shock made Missy gasp with a higher volume and pitch than usual, almost shouting. Sheldon began pumping his hips, shoving his penis all the way into Missy over and over, causing Missy's voice to gradually increase in volume. With her eyes shut tight, she yelled, "Sheldon! This is too much!" Sheldon looked at her in concern. "Should I stop?" Missy managed to half open her eyes to look at him. "Of course not! Just hurry. I don't know if Georgie heard me."
Sheldon pulled his penis out all the way, and, just as he shoved it all the way back in, he heard a creaking behind him.
