She said, “You can toss your shorts on the pile with the rest of our clothes. We’ll do some laundry later.”
I was uncomfortable at the prospect of baring my private parts. It was one thing to jerk off with Josh, especially because I was so horny that I could hardly help it. But it was another thing entirely with Ashley there. Plus, even though I’d shot my load just a few minutes before, I could feel a thickness returning to my member, unquestionably caused by her. After all this mental dithering, what came out of my mouth was, “Um, well.”
Sensing my reticence, she said, “Whatever. Suit yourself.” The ensuing silence felt awkward to me, but maybe only to me. Josh was quiet, but he was tickling her hip, and this made her giggle. She shifted herself around, apparently enjoying his attention, and I could feel every one of her movements transmitted through my leg. “So tell me more about your science fair project.”
“Oh,” I said, “no, it’s not for a science fair. Josh is the one who kind of made it into a science project.”
“He’s very analytical that way.” At this remark Josh must have done something to her-I couldn’t tell what-because she shrieked and squirmed towards me. She moved her arm away from my shoulder and instead rested her palm on my thigh. After recovering, she continued. “What’s the project about?”
I was even less excited to describe this to Ashley than I was to Josh earlier. I went for concise and neutral, hoping for a short conversation. “The goal was just to measure my precum.”
“Why?”
So much for short. “I just wondered if it’s a normal amount.”
Josh, who had been uncharacteristically silent for most of this discussion, finally chimed in. “Alex is concerned that he makes too much.”
“Ooh, now I’m intrigued,” Ashley said. “As far as I’m concerned, there’s no such thing as too much. Better to be too slippery than too dry, right?” She started to run her hand back and forth along my thigh, the tips of her fingers grazing my shorts-turned-cumrag and coming dangerously close to my crotch. I wasn’t quite back to full mast yet, but it wouldn’t take long if she kept this up.
I said, “I mean, it’s just kind of annoying when it gets all over your underwear.”
“So how much are we talking about here?”
Josh laughed and said, “Yeah, that’s the project. You got it. Not so easy to measure, though.”
“Good point.” Ashley thought for a moment. “Maybe qualitative is the way to go. The whole idea is for you to be lubed up, right? How about just letting someone rate the slickness, like on a scale of one to ten.”
“I never thought of that,” said Josh. “That might work. But you would need-what do they call it-a control.”
“What are you talking about?” I asked him.
“A control. Something to compare to. Someone rates your slickness, then they rate the slickness of someone else as a control, they compare the two, and that’s the experiment.”
“See,” Ashley said, “you can still win the science fair. You just needed a woman’s perspective.”
Josh asked her the question that popped into my mind too. “So how would this person rate the slickness exactly?”
“Right, the experimental design. You could use a hand, but this seems, I don’t know, not ideal.” She let her hand creep onto my inner thigh, the tips of her fingers diving under my shorts. Her knuckles grazed my balls and the base of my cock, and I’m sure that touch was enough for her to realize that I was about 90 percent stiff again. Just after making that contact, she said, “Oh” with more inflection than usual, but then she kept describing the experiment. “It seems like with a hand it would be too dry most of the time, and anyway, I don’t think a hand is sensitive enough to pick up on minor differences in slickness.”
While describing this, she was still moving her hand in my lap. She kept her palm on my thigh and deliberately let the tips of her fingers brush back and forth between my balls and my stem. The contact was slight, but even still it was enough to harden me up all the way. I glanced down and saw her hand just barely pushing my underwear aside, not revealing anything much, but contributing to my arousal. I was still holding it in front of me, but I wasn’t resisting as she gradually shoved it away.
“Oral, of course, would never work,” she said. At this she worked a thumb and index finger through a thatch of fur and circled them around the base of my cock, in a perfect position to give me a stroke or two. On one hand I wanted that very much, but on the other hand, this was my sister. In any case, she kept her hand still, just feeling my girth and an occasional throb. “There’s too much saliva. You wouldn’t notice enough difference in the precum.” After a pause, she said, “Although it might be fun to have a separate category for taste.” It never occurred to me to wonder how my precum tasted compared to any other guy, but now I was curious.
“Well,” Josh said, “regular sex wouldn’t work either. How would she know if the slickness was hers or his?”
“Yeah, I agree,” she said. “Vaginal sex wouldn’t work.” She put some pressure on her finger and thumb and yanked my rod out from under my shorts, letting it out in the open. The shaft was plenty thick, and she moved it around so the tip rested on my shirttail. I glanced in her direction to see if she was eyeing my newly bared anatomy. She wasn’t. But of course I caught a glimpse of her nipple, waiting patiently for attention, and this made my cock flex in appreciation. Since I was fully exposed anyway, I threw my underwear on the floor.
While she was playing with me, she was obviously still thinking, because she said, “There’s one thing that might work, though.”
I had no idea what she had in mind, but I was dying to know. She let go of my rod and slid her palm along the lower part of my shaft and my balls. I instinctively spread my legs apart, relishing this contact, my instinct not at all concerned that it was my sister who was fondling me. I felt something ooze out of my cock, probably leftover cum mixed with a fresh batch of precum. Sure enough, a little dot formed on my shirt.
Ashley left a pregnant pause, which Josh finally filled. “Ok, I’ll bite. What’s the one thing?”
“Labia.”
This certainly wasn’t what I expected her to say, and it didn’t sound like Josh expected it either. He said, “You mean, pussy lips?”
“Exactly. I’m glad you know at least that much about female anatomy.”
Josh said, “Yeah, but I’m not sure it would work. She’ll be making her own, um, wetness, right? I know-from past experience-she’s going to slicken up her own pussy lips. How could she tell the difference between that and precum?”
“That’s true,” she said, “but it’s more manageable than vaginal sex, wouldn’t you agree?”
“Sure, I agree with that.”
“And it has the advantage that the labia are, from an evolutionary standpoint, right where the penis belongs. It fits there.”
“Nobody likes having his cock up against pussy lips more than I do. Yours most of all,” said Josh. “But how can you get around the fact that she’ll be making her pussy lips wet all by herself?”
“I guess we need a demonstration,” she said. With that she stopped stroking me, lifted her heels off the floor, and put them on the edge of the couch, one on either side of her. This put her quim on display, so of course Josh and I both leaned forward to get a look. It was weird to see him sitting there on the other side of her, but it wasn’t weird enough to distract me from her body. She was mostly hairless with a little stubble here and there. Even though she wasn’t perfectly manicured like the woman in the video, it was infinitely sexier to have a real live naked woman right next to me. I was throbbing now and not even trying to hide it.
“Watch closely,” she said. She ran the index finger of her right hand along the cleft of her pussy, up and down a few times. I didn’t need her to tell me to watch closely. Her puffy lips distended under the pressure of her finger, but the finger stayed outside, fully visible at all times. Then she held up her finger in front of Josh’s face. “Exhibit A. Any dampness?”
Josh reached out and grabbed her finger, massaged it a bit, before saying, “Nope, dry as a bone.”
She held her finger over toward me, and after a hesitation I touched it too. “Yeah, it’s dry,” I said.
“Now watch closely again,” she said. This time she used the same finger again in just about the same way, but after a few strokes she arched her back and we watched that finger disappear between her lips. She pumped it inside herself a few times before slowly withdrawing it. She held it up to me this time. “Exhibit B. Alex, you first. Any dampness?”
I could tell by the sheen on her finger that it was wet, but I touched it briefly anyway, transferred some of that moisture to my hand. “Yeah, it’s damp,” I said. She moved her finger toward Josh’s side of the couch, but not before I took a whiff of that wet spot, learning her aroma for the first time.
Rather than a gentle touch like he’d given Exhibit A, this time Josh shot his head out and gulped the tip of her finger in his mouth, lapping it clean. After he released it he said, “Aah” like he’d just had his first sip of water after crossing a desert. “Mm, yeah, it was wet.”
“Case closed,” she said. “The outside is dry even when the inside is wet.”
She started to lower her heels back down to the floor, but Josh caught one and said, “I think some more evidence gathering is needed.” He put one heel back where it was, and she moved the other one back into position for him. As I watched, he ran his finger along her slit, careful to apply almost no pressure. “First things first,” he said. “All dry here.”
Then he changed the angle, pressing more firmly, making just the tip of his finger recede within her folds. He kept stroking her, extending the full length of her slit. She gave a moan of approval when he reached her clit, and he rewarded her by wriggling his fingertip there. He slightly shifted positions on the couch, enough to plunge his finger deep inside her. She moaned again, louder this time, and he kept up a steady rhythm moving it back and forth inside her. She lifted her heels off the couch and suspended them in mid air as he continued to stroke her. Her eyes were closed and her body was thrusting along with his finger.
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