Sister Tease

Jillian is my girlfriend’s younger sister. She has lived with us for two years, ever since the tragic death of their parents, who were killed in a car crash. Jillian is three years younger than her sister, Jennifer, who is twenty-two.
Jillian came into the kitchen, wearing only a long, white T-shirt that barely covered the tops of her thighs. When she reached up into the cupboard for a cereal bowl, it rode up a little, and I could clearly see that she was not wearing any panties. Her legs were spread just a little, and I could detect her clit peeking out from between her naked labia. I had to adjust myself under the table at the sight.
When she turned around to face me, she had a secret smile playing at the corners of her mouth, and I knew that she knew the effect she’d had on me.
“You know,” I remarked mildly. “One of these days, you’re going to tease me, and I’m not going to take it sitting still, anymore.”
She turned to me and laughed. “Oh, Uncle Dave, you’re not ever going to do anything about it.” she said, flipping her shirt-tail up and letting me see the front of her bare pussy. “And the more you see, the less you can sit still!”
It was true. I had a tremendous boner under the table, and we both knew it.
“Jillian, you know better than that!” said my wife’s voice, from the kitchen doorway. “I’ve told you a million times not to tease him like that!”
“Oh, c’mon, sis, it’s harmless!” Jillian laughed. “Besides, you’re right here to take care of him!”
“Well, I guess that’s true.” Jenny laughed, catching my hand. She pulled me to my feet, and I followed her to our bedroom.
“I’m serious about her teasing me like that.” I told her as she pushed me onto my back on the bed. She tugged my boxers down and tossed them carelessly over her shoulder. “One of these days, I’m going to just… Ohh, Jesus, honey, that feels…” Words failed me as she took my whole member into her mouth, knowing that I wasn’t really serious about ravishing her sister, no matter how bad she flirted with me. I’m not a small man, by any system of measurement, and Jenny is the only woman I’ve ever been with that could take the whole thing on the first go, without having to work her way down a little at a time.
“You’re just going to what?” she said with a smile, looking up at me as she let the tip of my cock play over her lips and nose. “We both know you’re not going to do anything with her. Besides, she’s just playing. It’s a game to her, nothing more.”
“Yeah, I know.” I sighed. “Fun for her, not so fun for me, though. What you don’t see is how bad I get when she does it. I mean, yeah, you’re here to take care of me now… Ohh, JESUS, honey, you know how that drives me wild!! But what about when you’re not here? She teases twice as bad when you’re NOT home…”
“Well, she still doesn’t mean anything by it, mffphmf, numffph.” I couldn’t hold back anymore and burst my load right down Jennifer’s throat, and she swallowed repeatedly, not missing a drop.
She left me flopped back on our bed and proceeded to get dressed, then sailed off to work after blowing me a kiss. I nodded off to sleep again, waking up about half an hour later.

I wandered into the living room, and there was Jillian, still in her oversize T-shirt, sitting on the couch with her knees drawn up and her bare pussy right out in the open for everyone to see. She saw me glance in that direction and opened her thighs with a secret little smile.
“Good morning, Jillian.” I said, not giving it a second glance as I went by on my way back into the kitchen. I wanted more coffee.
“What does Jen do for you in your bedroom when she “takes care of you?” she asked, following closely behind me.
“You don’t want to know.” I replied, tossing out the half cup I’d left before, because it was cold.
“If I didn’t want to know, then I wouldn’t have asked.” Jillian said, watching me pour a fresh cup.
“Oh, sorry, I was trying to be polite.” I said. “It’s none of your business.” I told her bluntly.
“Well, if I guess, will you tell me?” she asked, looking up at me and making eyes.
“No, because it’s none of your business.” I repeated tonelessly.
“Uncle Dave…” she said plaintively. “Well, I’m going to start guessing, and I’ll know when I’ve gotten it right by the look on your face.”
“Jillian, I’m not playing this game with you.” I warned her. “In fact, I’m all done playing any games with you.
“Who says I’m playing games?” Jillian pouted. “None of this has ever been a game.”
“Really.” I said blandly. “So when you flipped up the front of you shirt this morning, that was no game?”
“Not really.” she said. “I just like making your thing hard.”
“I see.” I said. “And that’s fun for you?”
“Sure!” she laughed. “You get the funniest look on your face when it happens!”
“And do you know what I have to do after it gets hard like that?” I asked her, turning to face her directly. She took a step back at the look on my face.
“No, that’s the part I’m asking about.” she whispered. “Just what is it my sister does to take care of you?”
“Hasn’t anyone ever told you about the birds and the bees?” I asked her, incredulously. “You mean you honestly don’t know?”
“Birds and bees? What has that got to do with anything my sister does in your bedroom? We don’t have a bird, and Jen’s allergic to bees.”
“I’m talking about the reproductive process.” I said, patiently. “You know, how babies are made?”
“You go into your bedroom to make a baby?” Jillian asked, confused. “That only takes 9 months, and you’ve been doing it for a couple of years.