It wasn't any great surprise to me that Charlene and Sis each experienced an orgasm while we were all involved with each other: with the double stimulation she was receiving, Charlene was the first to find her release; when she'd recovered, she apparently dedicated herself to returning the favor to Eva. I had reached the point that having another climax was possible when Charlene slipped into a second (and stronger) orgasm. Again, she devoted herself to getting Sis off when it had tapered off. Evas second climax was patently stronger, too, and it took a little time before she was able to pick up where she'd left off between Charlenes firm thighs.
By that point, it was becoming clear to me that both of them were beginning to tire — not just from what we were doing, but from what they'd experienced. While I'd been fucking myself into Charlenes tight sheath, I'd also been caressing whatever parts of her I could get my hands on: leaning forward a bit so I could cup her breasts in my hands so their swaying dragged her nipples across my palms, teasing her anus with my thumb, lightly drawing my fingertips up and down her back and along her thighs, and even supporting myself with my arms so I could gently bite her shoulders and ears and the back of her neck. So when I leaned forward again, it wasn't any big deal for me to get my mouth next to her ears and softly tell her "I'm going to be able to cum again before too long. If you want to get Eva off again, it'll be just you and me then."
In response, Charlene softly declared "Oh, god, yes!"
Hearing that, I nibbled on her ear a little bit before raising up enough that I could roll her erect nipples between my fingers, and tweak them a bit (and none too gently). Charlene pressed herself back against me before lowering her head to Sis' pelvis again.
I raised myself up again, and continued cycling myself in and out of Charlene as I waited for her to bring Eva to another (final) climax.
I doubt that I'll ever know if it was because Sis was already that aroused, or Charlene did more of something (or did it better), but it didn't take long at all before I heard Eva start making the noises that signalled an impending orgasm. Even sooner than I'd expected it, I felt Sis let her head fall back onto the bed just ahead of her crying out in what was plainly and powerful release.
When Charlene finally lifted her head again, she turned to look back at me — and it was easy to see that the lower half of her face was shiny with what had to be a mixture of her saliva and Evas oils. With a self-satisfied grin on her face, she told me "I'm ready whenever you are!"
With that, my sole purpose in life condensed down into one goaclass="underline" to try and bring Charlene as powerful of an orgasm as could be managed. And I applied myself toward reaching that goal with a will.
Thinking back to the times that I'd been with Charlene, I went about trying to remember everything I'd ever done that had drawn a positive response from her… and then doing them. Except that I didn't just repeat what had already worked; I went back to experimenting a little bit to see if I could do them even better. As it turned out, there were a few things that I learned how to improve — and Charlenes reactions made it MORE than clear that the changes were appreciated. It took only a few minutes for me to get her to the edge of having her third orgasm of the evening, and it was when I bit the back of her neck while giving one of her nipples a somewhat harsh pinch that she slid into a deep and powerful release. The tightening of her vagina around my erection was greater than it had ever been before, and it was only the sudden and dramatic increase in her lubrication that made it possible for me to continue pistoning in and out of her. Even the duration of her orgasm was longer than anything I'd seen her go through before, and it only confirmed to me that trying to do more for them actually resulted in me feeling even greater pleasure, too.
When the spasms coursing through her body had tapered off, I heard Charlene absently announce
"Christ, that was good!"
Figuring that if she was able to talk, she was recovered enough, I quickly resumed my efforts.
It was easy enough to get her arousal back up to its previous level, and then raise it even higher. Soon, both of us were in nearly constant motion; all either of us could do was make nearly constant unintelligible noises as we were all but overwhelmed with the pleasure and desire that were a consequence of our coupling. I could feel myself rapidly approaching the point that I'd have to unload my cum in her when I heard and felt Charlene fall into her fourth orgasm that evening. The sudden rhythmic tightening of her sheath was all it took to transport me to, and then beyond, the point of release.
With a deep and intense groan, I somehow avoided slamming myself into her; instead, I once again filled her with my manhood in a single controlled thrust that ended only when the clenching ring of her opening was wrapped around the very base of my penis — and just ahead of spray of semen coating the deepest recesses of her womanhood.
The end of my climax had me wanting to do nothing more than unplug from Charlenes grasping gash and lay down for a brief four or five hour nap. But it sank into my consciousness that Charlene was nearly done with her own pleasure, so I steadied myself by holding on to her hips until I felt the tremors within her taper off — then, with my cock still buried in her, it was up to me to get the two of us down onto the bed without doing anything to hurt Sis. By thinking through what I wanted to do, and how, I somehow got both of us from over Evas head and ultimately laying on our sides on the bed.
Keeping my arms around Charlene, I let my head fall back and closed my eyes… but coming awake whenever Charlene moved or made a noise. I was watching when she finally opened her eyes… not that I think she was alert enough to notice. She blinked a few times before letting her eyes wander around the room for several seconds, then focused her gaze on me again. That's how I was able to see the change in her expression when she started to move, only to realize that my mostly-erect cock was still inside her. Her eyes got wide and she tried to say something, but the only sound that came out was a weak croak. She tried to give me a dirty look, but was still too out of it for it to have the impact she would have liked.
A minute or so later, she swallowed and tired again; the second effort was a success only because she managed to ask "What the fuck did you do to me?" in a decidedly gravelly voice.
Learning from her example, I made sure my throat and mouth were wetted before answering "I just tried to make it as good for you as I could, is all."
It must have taken a full minute of her considering that until she told me "Yeah, you made it good for me, all right. Damn near killed me, but it was good."
Concerned that I might have gotten carried away, I asked "You didn't like it?"
"Oh, I liked it. I just wasn't expecting anything like that, is all. If you can do that every time, or even just want to try doing it every time, I'm fine with it!"
About that time, my softened cock slipped out of Charlene's intimate grasp; almost immediately, I felt Sis move from where she was laying on my other side; it was only a matter of a few moments until she was positioned with her head between Charlene's thighs, returning the "clean-up" favors.
Naturally enough, I had to look down to where Sis was enthusiastically removing any traces of my or Charlenes juices, and the sight of her eagerly lapping at Charlene's opening got a fair amount of my attention; along the way, I also noticed that Charlene's stiffened mini-penis had returned to its more normal flaccid state — something that told me that the orgasms she'd experienced really had satiated her.