"MMMM!" Scarlet let out a little yelp that sounded more like a lewd moan with her mouth stuffed with cock. The sensation of her sister's teeth was so powerful it sent shivers of pleasure down her cock and all the way up her spine.<br/><br/>"Oh fuck!" Scarlet thought to herself, still thrusting her head onto that delicious meat. "I hope she does that again!"<br/><br/>Emily was taking...what? 6 inches? Scarlet had measured herself once and was surprised to find she had 8 inches when she was really hard! Most guys weren't that big. And now Emily was taking almost the whole thing for her first-oooh! Oh damn, there were those teeth again. Scarlet moaned into Emily's cock, making her whole mouth vibrate. Hey, there was an idea! She began to moan louder, making the vacuum of her mouth vibrate over and over again like a little massage. She was sucking with as much energy and vigor as she could muster, her head bobbing back and forth at a crazy speed. Making her sister cum, that's all she had in mind, even as her own cock was being lavished with so much love!<br/><br/>Every once in a while she would gag a little whenever Emily's cute cockhead would touch the back of her throat, and she found that the sound turned her on...a lot! The sensation of Emily's cock going so deep was positively rich with pleasure, and she found herself trying to go deeper and deeper, to push the limit.<br/><br/>Suddenly, she felt something wrap around the base of her cock and begin jerking back and forth! Fuuuuck! Emily was using her fingers to get what her mouth couldn't, and it made her entire cock want to explode! All of a sudden every single inch was being stimulated. She hadn't gotten all of Emily's cock yet with her mouth...but she didn't want to just copy what Emily did. What was the fun in that?<br/><br/>Then Emily suddenly released Scarlet's cock with a  pop that sent an ball of explosive pleasure to her brain. Just the noise was so sexy Scarlet practically whimpered around Emily's member, but she never stopped sucking as tightly and bobbing her head as fast as she could.<br/><br/><em>“Fuck sis, that is one tasty cock!” </em><br/><br/>Emily's words made Scarlet giggle, which sounded really weird at the moment, but she didn't respond. She was busy after all. Still, she needed a way to up the ante. Emily had started using her hands, and now Scarlet needed something new too. Her hands...what else could she do with her hands? The answer hit her when she raised her eyes and saw that lovely sack right at eye level. Smiling around the rod in her mouth and pumping her head even more furiously, her hands came up and gently began to massage those soft little orbs of flesh below her shaft. Teasingly pulling on them and lubing them up with saliva, she worked them gently, sensually, and teasingly as she could, all the while thrusting her mouth onto that shaft as far as she could.