Well after I'd decided that I'd learned all I could from watching Charlene with Eva, it was time to see what was going on at the other end. As before, I was slow and careful enough that I was able to get into position without distracting or disturbing Eva. What Sis was doing to Charlene was much the same treatment as she was receiving — with the notable exception that Sis was also including the miniature penis that made up Charlenes clitoris. From where I was, I could easily see that every time Sis went to work on Charlenes shaft, Charlenes vagina would all but drip the lubrication that Charlene produced as a result of the stimulation. Periodically, Sis would release her liplock on the undersized staff in favor of lapping up the overflow of oils; from there, she'd go on to apply any number of soft lip-bites, kisses, and gentle suction to Charlenes thin labia before beginning another bout of fellatio.
I'd had Charlenes appendage between my lips before, and even managed to suck on it and lick it — but I'd never been able to muster the courage to actually treat it the way Sis was. But seeing how Charlene was reacting to it, I swore to myself that I would. Until that opportunity came, however, I found myself getting more and more aroused not only from seeing what Sis was doing, but knowing how it was affecting Charlene. Sooner than I'd have thought possible, I had a full-blown erection and was more
than ready to put it to use.
As loathe as I was to interrupt what the two of them had going on, I wanted to feel Charlenes tight pussy wrapped around my cock. Moving my head close to Evas as she slid her lips on and off of Charlenes shaft, I softly asked her "Would you like to keep doing that while I'm in her?"
Sis pulled her lips off of the miniature erection Charlene sported to answer "Yeah, I'd like that a lot — and so would she!" before all but inhaling it again.
Getting to my knees, I moved behind Charlene; as soon as she felt my hands on her hips, she raised her head just long enough to let me know "Oh, god, yes! I'm so ready for you to fuck me!" before lowering it to Evas pelvis again.
Moving myself a little closer, I levered my erection down and got it nestled between the small, thin lips bracketing Charlenes drooling slit. With a firm but gentle arch of my hips, I slowly buried myself into the tightness that was Charlenes womanhood. When I felt her ass pressing against my lower belly, I stopped to savor the sensation of being thoroughly encased in hot, wet, and tight woman-flesh; I wasn't worried about the little bit of my manhood that was still outside her — experience had taught me that once I started moving in her, she'd loosen up enough to make it possible for the rest of my cock to slip past the tight ring of her opening.
As I always did, I waited for Charlene to let me know she had gotten used to having my erection in her undersized vagina; when she started pressing herself back at me, I knew she was ready for me to continue.
I have to figure that it was simply because her vagina was physically smaller than usual (as a result of her hermaphroditism), but every time I made love with Charlene, she felt almost as tight around me as she had the first time. So when I began sliding myself in and out of her womanhood, it was slow and leisurely at first so I could enjoy the feel of her hot and wonderfully tight sheath wrapped around me.
Then, as her more than ample wetness got better and better distributed along my length, I was able to gradually increase the pace and force of my strokes into her — and was again pleased and surprised at how readily (even eagerly) she accepted my efforts.
While I was still taking my time about pistoning myself in and out of Charlenes channel, I could feel Evas head moving slightly between my legs; knowing that she was enthusiastically using her mouth on Charlenes abbreviated penis while I had my stiff dick in Charlenes undersized pussy began to get to me in a way that I hadn't expected: me and my sister were both having sex with the same person, but in completely different ways. That knowledge got into my head, and turned me on so much more than I thought anything could — even more than the sight of the two of them being intimate with each other had been.
Despite the fact that my dick was harder than it had ever been before, and felt like it just had to be at least twice as long, I managed to keep my "enthusiasm" for fucking Charlene under control. As I continued to steady slide myself in and out of her girl-chamber, Sis would occasionally let Charlene slip from between her lips in favor of tilting her head back and using her tongue along the underside of my cock; it took a couple of times of her doing that before I realized that she wasn't just stimulating me, but also getting tastes of Charlenes juices… which aroused me even more, knowing that my own sister wanted to taste the same pussy that I had my cock in. Eva wouldn't use her tongue on me for more than a few strokes at a time before re-applying herself to the staff that terminated with Charlenes clitoris; that she kept doing it over and over again, however, contributed greatly to keeping my arousal as high as possible.
Even with all the physical and mental stimulation I was getting from the situation, the climax I'd had with Eva had been recent enough that there was absolutely no chance that I was going to find another release any time soon. That meant I was free to simply enjoy the hell out of what I was doing with Charlene, and what Sis was doing with me.
Over the course of the next several minutes, I gradually realized that Charlene was getting even more aroused and responsive to what was happening to her than usual. Once the knowledge got to the front part of my brain, it took only a moment for me to understand why: it was the simultaneous stimulation of my cock moving in her and the attentions Sis was providing to male aspect of her sexuality.
Charlene had already shown me that she was more than capable of enjoying coitus, just as I knew that paying attention to her underdeveloped penis (and particularly its head) aroused and pleased her.
That was when I realized that the current situation was almost certainly the first time that Charlene had had both aspects of her unique sexual makeup stimulated that much and at the same time.
I was honest with myself enough to know that I'd get off, no matter what; that was when it occurred to me that maybe — just maybe — making Charlene (or even Eva) feel as good as possible would add to the pleasure that I got out of making love with them. I understood that there was likely a considerable difference between what I'd already been doing (trying my best to make sure they enjoyed our time together) and what I could do (trying to make them feel as good as possible). With that decided, it was a simple matter to begin implementing the changes I wanted to make.
Maintaining my gentle bur firm hold on Charlenes hips, I began experimenting to see if there was a different way of moving in her that she would enjoy more. It took only a very few minutes to find a combination of stroke and speed and force that really worked for her: there was a rapid and dramatic increase in how wet she felt around me, and the intensity and volume of the noises that she made.
As a result of that, Sis had ample reason to cycle more and more often between what she was doing to Charlene, and what she was doing to me — and then go on to lap up the flow of Charlenes feminine oils that were beginning to trickle down and add a distinctly liquid tone to the slapping of my balls when they swung forward.
The added stimulation and attention being paid to her prompted Charlene to increase her efforts between Sis' thighs, ratcheting Evas desires even higher in return.
I don't doubt that we would have presented quite a sight to anyone that had happened to look in on us: me enthusiastically plundering Charlenes treasure, Eva industriously fellating Charlene, and Charlene eagerly applying her oral talents to Sis' womanhood. The air was thick with the scent of aroused female, and the room echoed the moans, groans, gasps, and other sounds of pleasure and arousal that all of us were making.