Sis and I both turned our heads to look at Charlene, who was still seated in Sis' chair. The area between her thighs and a couple of her fingers were shiny, and there were obvious bite marks on her hand. It didn't take a genius to figure out that she'd undoubtedly masturbated herself to an orgasm, and used her fist (and biting it in the process) to keep from disturbing us. The sight of her did wonders for delaying the shrinkage of my cock… but couldn't prevent it.
With Sis' and my attention on her, Charlene suddenly blushed slightly and then hesitantly told us "I… I just couldn't help but watch you… you were so into each other, I could tell that you'd completely forgotten about me — and I was glad. But it was so sexy watching you, too, that I couldn't help start touching myself. It felt so much better and got me so much hotter doing that while I was watching you that I had an orgasm that I was afraid was going to kill me, or something. I just barely managed to remember to put my hand in my mouth so I didn't make enough noise to disturb you!"
I think Sis and I both smiled at her before Sis told her "It's okay, Charlene. I'm pretty sure that if I ever get to watch you and Billy, I'm going to get pretty worked up, too!"
Before I could say anything, however, I felt my softened penis slip free of Eva. She turned her head to look up at me as I carefully eased myself from above her and moved to lay on my side behind her.
Even as I started moving, I could see Charlene begin to get up from Sis' chair. What baffled me was when she moved toward the bed instead of making for the door to Evas room and the bathroom down the hall. I got even more confused when she calmly moved to lay on the bed — between Sis' raised knees and parted thighs. When Charlene moved close enough to begin softly licking up my semen as it slowly dribbled out of Evas vagina, the realization that the two of them had had their own intimate times together suddenly made sense of some of the things that I'd heard each of them say at different times. The images of the two of them together that started playing in my mind were set aside when I suddenly remembered that I had the real deal happening right there in front of me.
That was all it took for me to focus my attention on where Charlene was enthusiastically ensuring that the semen I'd left in Eva didn't reach the bed. As I watched Charlene tonguing and licking Evas crotch, it slowly got my attention that Sis was beginning to respond favorably to her female lovers efforts: Evas areolas were starting to crinkle, and her nipples were discernably longer than usual. Added to that was a distinct increase in the aroma of aroused female in the air; it took me only a few moments to decide that it was a mix of both of them.
It had become apparent that Charlene was nearly finished with her self-appointed task when Sis turned her head and tentatively asked "You… you don't mind? About me and Charlene?"
Giving her a kiss on the cheek first, I answered "Not even a little bit. It surprised me, at first, but then I remembered some of the things I've heard each of you say — so I guess maybe it wasn't that much of a surprise. I love you, Sis, and I love Charlene. I've known for a long time now that you women can have a lot more fun than us guys can, so if you and Charlene can make each other feel good, then I'm happy for you. I'd be disappointed if neither of you wanted anything to do with me, but that hasn't happened, so I'm cool about it."
A second later, I couldn't help grinning as I told her "Besides, I think it's pretty hot!" — earning me a faint blush before she playfully slapped my chest.
A moment later, and I felt a hand applying a slight pressure against my hip. I looked down, and saw that it was Charlene. When she saw me looking at her, she smiled at me before saying "Now it's your turn."
It took only a moment for me to roll onto my back, followed by Charlene taking my flaccid penis between her lips. While keeping her hands on my thighs, she used her tongue and lips to meticulously clean my cock of any residue from my lovemaking with Eva.
It had been long enough since I'd emptied myself into my sister that Charlenes oral ministrations had no small effect on my libido. When she finally released me from between her lips, it was pretty clear that she'd gotten a reaction out of me. Charlene and Sis both looked at my semi-erect penis for several seconds before Charlene gave Sis a Look. A second later, I heard Sis say "I really wish I could make love with you again, Billy. But even as much as Charlene and I tried to get me ready, you still stretched me inside more than I expected. I think I could make love with you again, but I'm afraid that it would leave me feeling too sore. So if you want to, it's okay with me — I'd like it, even — if you wanted to make love with Charlene."
When I looked down at Charlene, I saw that she'd be more than willing for the two of us to make love, whether my sister was watching or not. Nothing for me to do, then, but say "I'd be happy to be with Charlene, if that's what you want", the last directed toward Charlene. She nodded that it was, and I continued "It's just going to be little bit before I can, is all."
Charlene and Eva looked at each other for a moment before Sis asked "Didn't you tell me that you thought me and Charlene together was pretty hot?"
Thinking I knew what she was getting at, I readily admitted that I had. Evas grin looked like it was going to wrap all the way around her head as she told me "Well, maybe we can give you a little extra…
inspiration. Think you'd like that?"
I grinned back as I answered "I think I could probably handle that — for a while, anyway."
Neither of the girls bothered to say anything in response. Instead, Charlene just raised up so she could knee-walk her way to the other side of Eva from me. Before either of them had to say anything to me, I carefully moved over a little bit to give them room for whatever it was they were going to do. When I'd settled onto my side where I'd have a good view, Sis shifted herself around a little bit so that she was at right angles to me. As she started to bring her knees up, Charlene carefully got herself positioned over Sis' head… then leaned forward and got her head between Evas thighs as Sis lifted her own head. A very few seconds later, and I began to hear the soft sounds of mouths and tongues and lips being put to work on labia and clitorises and vaginal openings.
The sight of the two of them, naked and nubile, in the classic '69' position was something I know I'll never forget. Wanting to see what really happened between them (as opposed to them putting on some kind of 'show' for me), I stayed still and quiet for the next several minutes as they pleasured each other.
Only when I was sure that they were too involved with each other to pay any attention to ME that I finally moved from where I was — slowly, quietly, and above all, carefully, so I didn't disturb them.
The first thing I did — had to do! — was move down to where I could see what Charlene was doing to Sis. It wasn't any problem for me to find an angle and distance that let me watch Charlene tending to Evas womanhood without drawing Charlenes attention. As much as I enjoyed using my mouth on them, I wanted to see if there was anything I could learn from watching how they pleasured each other.
Over the course of the next few minutes, I did indeed get the opportunity to learn a few things that would help me when I was with one or the other of them. I also found myself getting more and more aroused as I watched Charlenes pink tongue dancing across and between Sis' delicate labia and dipping into Evas womanhood. Close as I was, it was easy to see that more and more of Sis' tasty oils were escaping her, only to be gently lapped up by Charlene between bouts of Charlene tenderly teasing the nubbin of Evas exposed clitoris.