"Oh God, Jack! I'm cumming!" She is feverishly rubbing her clit and I am twisting her back and forth as fast as I can. Her pussy seems to be trying to clamp down on my cock, but can't get a grip because of the corkscrew effect of the apparatus.
"Spin me, Jack! Spin me! Spin Meeeeeee! Fuck! I'm cumming!" I'm frantically twisting her back and forth, literally screwing her up and down on my cock. The harness keeps her from bucking, like she usually does, but I can feel her pussy muscles pulsating against my cock, as I twist her up and down.
"Stop! Stop me, Jack! Stop me!" Lisa yells, panting hard. "I need to stop." I stop twisting her and her pussy slides all the way down my cock, crushing her wet lips against my pubic hair. I can feel her pussy muscles tighten around my cock like a vice. I slide my hands down under her ass and massage her hot, round cheeks, slick with her juices. She reaches down between my legs and starts playing with my balls. I want to pump up into her, but her weight keeps me from moving. I just lay there with her hand massaging my balls and her pussy pulsating like a vibrator around my throbbing cock.
"Get me out of this, Jack. I need you to fuck me. I need to feel your hard cock pounding me. Get me out of this harness, now!" She moves her hand off my balls, as I twist her all the way up and off my cock. As soon as her lips clear the tip of my cock, she gushes creamy, hot juice all over me. It runs down over my balls and between my ass cheeks, creating puddles on the air mattress. I roll to the side and let her twist back down. Steaming syrup is still oozing from her pussy lips, as they hang a few inches above the air mattress. I can't resist a quick taste and I lay on my back, positioning my mouth under her pussy. Pushing my tongue deep inside her saturated cunt, I gently swing her across my tongue, as I lap up her thick nectar.
"Oh Jack! Yes! Yes! That's wonderful!" I've never eaten her from this position and her syrupy juices drench my face, as they continuously flow out of her burning, hot snatch. I keep gently swinging her back and forth, as I push my tongue deep inside her pussy, drinking her hot juices.
"Goddamn, Jack! I'm cumming again! I can't believe what you're doing to me!" With that, her pussy hole opens wide and she floods my face with wave after wave of hot, juicy cum. I eagerly lap it up, savoring the sweet, sexy taste of her.
"Now, fuck me, Jack!" Lisa yells.
I pull the straps from around her legs and help Lisa get the big one from under her arms. She falls on her back on the sticky, wet air mattress, and lifts her legs up to her shoulders, exposing her wide open, dripping cunt.
"Hammer me, Jack. Pound my pussy with your hard cock." I slam into her in one hard stroke and pound her soggy pussy like a jackhammer. My balls, which have been building up cum for nearly an hour, are smacking her ass on every down stroke.
"That's It! Fuck me, Jack! Fuck me hard! Oh God! I love it! I fucking love it!" I'm pushing her legs down until her toes touch the air mattress, just above her shoulders, and pummel her pussy with my cock. I can feel my balls tightening and I start pounding even faster as I near my long awaited release.
"I'm cumming, Sis. I can't hold back, I'm cumming!" I push deep inside of her and my cock erupts, flooding her pussy with my hot jism.
"I can feel it, Jack! I can feel you cumming inside me. It feels so good. I'm right there with you! I'm cumming, too!" Her pussy clamps down on my cock, as I jerk in and out of her. Her pulsating muscles milking load after load of cum from my throbbing cock, mixing it with her own gushing juices.
I release her legs and she lowers them back down on the air mattress. Our hearts are pounding against each other, as we gasp for breath. I raise myself up on my arms to take deeper breaths and watch Lisa's chest rising and falling. Her nipples are as hard as steel, sticking out like bullets from her milky white mounds. I enjoy the sight for a minute before leaning back down, crushing her tits against my chest. We are both totally spent, and I lay on top of her, with my cock buried in her pussy. It's long time before either of us moves.
"Why were you looking at me like that?" Lisa asks, a quizzical look on her face.
"I love looking at you. I've always loved looking at your perfect tits. They've turned me on since the first day I saw them," I say, reaching between us and cupping her right breast with my hand.
"Always, Jack? A whole two months now, huh?" Lisa laughs. I laugh too, but not the same way. I am staring into her eyes, trying to decide whether to tell her about spying on her when she speaks.
"What, Jack?" she asks, locking eyes with me.
"Actually, it's been longer than two months. I've been watching you through your bedroom window since right after we moved here." I'm holding my breath, waiting to see what she says.
"What?" She looks incredulous. I don't think she believes me.
"Yeah. I didn't have a girlfriend, I was really horny, and you looked so sexy in your swimsuit everyday, I had to see what you looked like naked. I started spying on you while you were changing."
"When? I never saw you," she says, shifting her body under mine.
"If you saw me, it wouldn't be spying, would it?" I say, sarcastically. "I was getting myself off outside your window everyday, Lisa, as you changed into your swimsuit." There I'd said it. I just look at her, still massaging her tit, waiting for her reaction. She doesn't say anything for a while. Then she looks right at me, smiling.
"That is so hot, Jack! I can't believe you were jacking off outside my window. What did you do? I mean did you have your cock out of your pants and everything?" She starts moving her hips a little, sliding my cock around inside her drenched pussy.
"Yeah. Well, I was only wearing my swimsuit, so I just pulled my cock out and shot my load on the ground. There must be a hundred loads of cum on the ground and bushes outside your window."
"God, I wish I'd known you were out there," Lisa says, squeezing her pussy around my cock. "I would have put on a little show for you."
"Oh you did, Lisa," I tell her. "You put on a hell of a show. Every time you put lotion on after swimming, I watched you massage your pink nipples until they were hard. Then, when you put your foot on the bed to rub lotion on your leg, I was staring straight into your beautiful, virgin pussy. It was an incredible show, believe me."
Telling my sister about spying on her, through her bedroom window, is having its affect on my cock. It doesn't hurt that she's flexing her pussy muscles around my hardening shaft. I keep massaging her breast, running my thumb across her erect nipple.
"Maybe I would have done more than spread my legs in front of the window, and rub lotion on, if I'd known I had an audience." She is breathing a little harder and pushing her pussy up get more of my cock inside her.
"I doubt it, Lisa. You hadn't yet turned into the hot nymphomaniac you are today." I laugh. "Remember, you were still a virgin who hadn't even touched a cock. I'd hate to think what would have happened if you'd seen me out there."
I'm slowing sliding my cock in and out of her slippery pussy. She's raising her hips to meet my strokes, as I drive deep down inside and then slowly glide back out.
"So all that bullshit about it being weird to fuck your sister was just an act, wasn't it? You had this planned all along, didn't you Jack? You manipulated this whole thing." She is humping hard against my cock, trying to make me quicken my strokes. I can tell our discussion is turning her on as much as the fucking. I keep pumping in and out at the same slow pace.
"No, it wasn't bullshit. I never in my life believed I would ever actually fuck my own sister. Yes, I fantasized about it and imagined I was fucking you while I jacked off outside your window, but I never thought it would ever go any farther than just spying. Then..." I tell her exactly what happened the day Tony called and how I hated to see her crying and well, she knew the rest.
We stop talking and start really fucking. The air mattress is making squishing sounds, as I again drive my cock deep inside my sister's insatiable young pussy. I kiss her, intertwining my tongue with hers, inside her mouth. We hold on to each other and rock our bodies together in a euphoric trance that obliterates everything, except our frantic need to drench ourselves in our incestuous lovemaking.
I finally collapse on top of my sister, trying to catch my breath against the rise and fall of her sweat-soaked chest. We are both exhaustively spent and her throbbing pussy is clamped tightly around my cock. I know Lisa won't want to move anytime soon, but I also know we need to clean up the garage and ourselves before Mom comes home. Lisa looks at me with half-closed eyes and a dreamy smile.
"We've got to spy on Mom," she says, holding her body tightly against mine.
The next day Lisa is in Mom's room, while I stand outside the window. Using our cell phones to communicate, I direct Lisa as she adjusts the blinds. We make sure they are just right so that I can see everything in Mom's room, but she can't see me through the window.
Mom's bed comes out from the wall on the right, as I'm looking through the window. Her dresser is on the left. Mirrored closet doors on the far wall allow me to see the chair, sitting in the corner between the dresser and the window. Lisa sits in the chair to make sure I can see her. She playfully spreads her legs and rubs her crotch, then stands up and bends over, shaking her ass at the window.
We make sure we are in the pool when Mom comes home and Lisa invites her to join us.
"Okay, give me a minute to change," Mom says, going back inside. Lisa and I run to her window. Standing next to each other, we have a clear view of Mom entering her room. She doesn't bother to close her door because she knows she's the only one in the house. Lisa is smiling and bouncing up and down excitedly on the balls of her feet.
"This is so cool," she whispers. "I can't wait."
"Shhh," I admonish her. "You won't have to. Here we go."