**PART FOURTEEN**
It was like I was in a trance, yet fully aware of what was happening at the same time. My hand moved of its own accord, exploring Natalie’s bare breast with yet another soft squeeze. Without her guidance this time, I brushed my thumb across her nipple in the way that seemed to make her react before. Sure enough, she slightly tensed just like Jessica from the sensitive spot they had in common.
Still idly smirking, she looked up at me and quietly said, “You can have the other one, too.” With a single finger, she traced up the entire length of my hardness over my boxers. Just enough pressure to ensure I stayed that way, while effectively teasing me at the same time. “If that’s what you want.”
There was no excuse. I had been given ample opportunities to put a stop to this, and this was a choice Natalie was letting me make all on my own. Gently groping her, instead of pulling away from her bare chest. And now, slowly raising my other hand until I was palming her opposite breast. Despite how I was feeling her up, a small part of me was desperately trying to be faithful even after the most amazing blowjob I had ever been given. “Natalie . . . ” I muttered. Meeting her eyes and trying to communicate how wrong all of this was without managing to even remotely find the words. Inappropriately touching her, but at least having the self control to keep my hands still for the time being.
“It’s okay,” she said. Her hand below took more of a grip around my shaft as she never once broke eye contact with me. “I won’t tell.” Slightly pushing forward into my hands, nonverbally nudging me to play with her now that I had a mirrored grip on her smaller breasts, she continued, “And you won’t tell, will you?”
Of course I wouldn’t. Jessica would murder me. My reputation would never recover, either. It was the worst possible kind of cheating, and we weren’t exactly attending the largest university. If I wanted to keep my girlfriend and our friends’ respect, then no one could ever find out about this. “No, but-”
“But nothing, babe. We’re just having some fun, aren’t we? It doesn’t mean anything. And you can’t deny that I turn you on; maybe more than Jessica does.” She delicately tugged at the waistband of my boxers, and then snaked her hand inside until her fingers were wrapped around my bare hardness. Like before, it was more of a teasing grip that kept me at attention without pushing for anything more. Yet. Then, after giving a small squeeze, she asked, “Do you want me to stop?”
That wasn’t fair. I obviously didn’t want her to stop. Her soft fingers were just as skilled and as tempting as before. It’s more that we *needed* to stop. Like, a long time ago. And her question was calling back to the out she had recently given me, where all I had to do was say the word. I had the power to end this right now. But, at the same time, the knowing tone as she asked made it more rhetorical than anything else.
Sensing my hesitation, Natalie spoke up as she idly traced up and down with her fingertips. “How about this? If you don’t want this, drop your hands. Easy enough, right?” Fuck. She was going out of her way to make it as easy as possible for me. Now I didn’t even need to say anything, as the seductive girl had made it pretty clear that she was capable of twisting each and every one of my words if she wanted to. Going on, she said, “But if you do want me . . . then *show me* with your hands.” To punctuate her emphasized words, she gave a long, slow squeeze with her hand that gave way for a single up and down pump of her hand that was just as sensual and teasing all at the same time.
Deep down, I knew that I shouldn’t. I had been telling myself over and over how wrong this was, but had yet to find the willpower to pull away. And there was that lingering nervousness about how long we had been up here. This should have ended after I released into her mouth, when I had a moment of level headedness. Instead, I was back to thinking with my dick, and Natalie knew it. Against my better judgment, and despite how easy it would have been to simply lower my hands, I gave into my basest desires. My fingers sunk into her soft breasts for a deeper squeeze than before, and I once again went for one of those effective nipple brushes; this time, with both my thumbs. Though I was being incredibly selfish and stupid through all this, I also felt the need to impress and satisfy the girl at the same time instead of just taking all the pleasure for myself.
Sharply inhaling and arching a bit into my hands, Natalie responded by squeezing me again down below before shifting her fingers in a way that caused me to slightly pulse against her hand. “Good boy,” she smirked, “Keep going.”
For a good minute or two, that’s all we did. I squeezed and massaged her breasts, both appreciating how she felt in my hands while also paying attention to the similarities between her and Jessica in terms of what worked and what didn’t. And, in a game she had unofficially started with me, Natalie taught me through both her reactions and her own touch. Whenever something worked well on her, I could usually tell through her breath and body language. But, just to be sure, she would also play with me more effectively whenever I found a good spot and/or motion on her.
It was the most unique experience I had ever had with a girl. There was no making out or roaming beyond her breasts like I would normally do to try to keep things interesting. And we were *still* looking into each others’ eyes. Not only was it confusingly intimate against all the wrongness that this actually was, but it allowed me to more fully see how my various touches were affecting her. While she still looked fairly smug with her constant smirk and deep gaze, I could see that she was getting a little flushed as we progressed.
I only felt more encouraged to get things just right, if only in the name of wiping that smirk off her face. And I did. Putting all the pieces together, I waited until her breath was hitched from one of my smaller motions before giving her what I had learned was a perfect squeeze followed by the usual nipple rub that never failed. To my satisfaction, as well as to hers, I succeeded in drawing a breathy moan from her lips as her eyes ever so slightly fluttered before she managed to train them on mine again.
Rewarding me with a touch below that brought me right to the edge again, Natalie backed off at the last second as she took a quiet breath. Then she finally broke the silence with a near whisper. “Has my sister ever let you fuck her in the ass before?”
——————-
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Source: reddit.com/r/eroticliterature/comments/127tsq8/the_sister_part_fourteen_m19f18_cheating_erotic
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