I chase them around in the water and eventually grab one around the waist. I check for the mole. There is none. It’s Alison. I take her in my arms and turn her around to face me. I lift her up and she wraps her legs around me. I feel her plump pussy resting on the shaft of my hard dick. I walk her to the rock and resting her back against the rock, she reaches under the water. Her fingers close around the shaft of my dick as she guides it towards her pussy. I push forward and enjoy the familiar feeling of sinking my dick into the hot, wet folds of her pussy. I fuck her gently for a while hoping Blanche will not notice what we’re doing. I support her with my hands under her butt while she has her arms around my neck, her firm breasts jutting into my chest. I walk around with her in the water, slowly fucking her in the process. She rests her head on my shoulder.
Suddenly Blanche lunges forward and tackles us both. We all lose our balance and my dick pulls out of Alison’s pussy. We all shriek with laughter and Alison walks out of the water. “I’m going to fix us something to eat and drink!” she calls as she walks out of the water in all her naked splendor, the subtle jiggle of her full breasts not going unnoticed as she walks. “Be good! See you later!”
This leaves just Blanche and me in the water. I chase after her and she swims away. I catch her behind the rock and pull her towards me. She pushes my head under the water. I grab her and start to tickle her. She kicks and screams and eventually ends up with both arms and legs wrapped around me. I revel in the sensation of her naked breasts pushing into my chest. I put my hands under her naked butt and pull her hips towards mine. My hard dick pokes her in the lower belly and she stiffens. I lift her up and lower her onto my dick, pushing it down between her legs. My dick nestles in the warm slit of her pussy.
“Please… Please don’t!” she says. But there’s no stopping me now! I start to hump her pussy and feel the head of my dick lodge in her slit. She panics and the only way she can stop me from penetrating her is by grabbing hold of my dick. She pulls it away from her pussy and hangs on to it. I lower my head onto her left breast and my lips close around her hard, rosy nipple as I suck it into my mouth. She moans.
“Please! We can’t… For God’s sake, she’s my twin sister, damnit!” I ignore her pleas and continue rolling her nipple between my lips. I start to hump her hand holding my dick. Her grip tightens around it. I slide my right hand underneath her from behind and cup her naked pussy in my hand. She squirms.
“Please don’t… What if Alison sees us?” she pleads.
“She won’t. She’s on the other side of the rock.” I whisper in her ear. Then I take her nipple in my mouth again, at the same time slipping my middle finger into her hungry hole. She moans and pulls my head into her breast. I slip another finger into her cunt and begin to seriously finger fuck her. She squirms and finally I feel her hand beginning to move on my dick. She is wanking me!
I lift her hips slightly and take my fingers out of her cunt. She gets the message. I spread her pussy lips from behind with my fingers, while she raises my dick and places its head against her hungry hole. I lower her onto my dick and she groans as the soft petals of her pussy open up under the pressure of my dickhead and allow my cock to slide effortlessly into the soft warm folds of her cunt. I slowly fuck in and out of her pussy while she wraps her arms around me, her nails biting into the skin of my back. I am surprised at the fact that I might as well be fucking Alison. Everything feels the same, she responds in the exact same way, even making the same whimpering noises as I fuck her. Her hips meet my every thrust with gusto. Then I feel the tempo of her hips picking up. There is a slight trembling in her hips and her hands are roaming frantically over my back and shoulders. I realize that she’s about to come. I grab her hips and fuck her as hard as I can. Then I feel her nails biting into my flesh. Knowing how noisy Alison becomes when she has an orgasm, I anticipate her scream. My hand closes over her mouth to stifle it. She begins to shudder and then her hips contract into uncontrollable rhythmic spasms as she explodes into orgasm! She bucks and I find it hard to keep my dick inside her. I hold her until the bucking subsides. Then I begin to fuck her again gently. Eventually I feel the tension build up in my balls and decide to shoot my load inside her. Then, just as I’m about to come, we hear Alison calling out.
“Snacks and drinks ready!” she shouts. This knocks Blanche to her senses and she pushes me off her. Damn! She wades out of the water with no inhibitions whatsoever and walks into the direction of Alison. I follow with my raging hard-on leading the way.
“My! You ARE glad to see me!” Alison quips.
I ignore her witty remark and sit down on the towel, taking a sip of wine. We have something to eat and then the two girls walk into the direction of the van. I can see they’re discussing something but cannot hear a thing. Our swimming gear is still lying on ‘the island’ in the middle of the pool.
Then they look at me and start walking in my direction. It is as if I’m seeing double. Even the subtle jiggle of their boobs as they walk seems to be synchronized. Alison has the first aid kit in her hand.
“We would like to give you your birthday present now. But first we’ll have to blindfold you. And remember, once we remove your blindfold, no more talking from any of us!” Alison says.
I’m a little puzzled, but cannot wait to find out what my birthday present is going to be, so I play along. They take a towel and wrap it around my head. I wait for a few seconds and then they remove the towel. Alison pushes me gently onto my back and kisses me. Or is it Blanche? I quickly look for the mole on the shoulder, but am surprised to find it covered by a band-aid. I look at the other sister and am even more surprised to find a band-aid in the exact same position. The devils! Now there is no way I can tell them apart!
I call Alison’s name, but no response from either of the two. Then I get gently pushed onto my back by one of them. She (A) kisses me while the other one (B) wraps her hand around my dick and slowly starts to wank me. My dick is already rock hard! A breaks the kiss and unceremoniously proceeds to sit on my face. She gasps as I suck her clit into my mouth.
Then I feel a warm, moist sensation as B’s lips close around my dick. I slowly fuck in and out of her mouth while eating A’s pussy. This is heaven! But at the same time the uncertainty is agonizing! For some reason I simply HAVE to know who is who!
Suddenly B moves her mouth away from my dick and straddles me. Holding my hard dick upright she lowers herself onto it. I tear my face away from A’s cunt and is just in time to see my dick slowly being swallowed by B’s cunt. She then starts to ride my dick slowly and rhythmically. Who the hell am I fucking?! I look up at the shaven pussy above me, hairless except for a thin line of short hair above the slit again a carbon copy of the one I’m fucking!
A reaches out and cups B’s breast in her hand, taking her nipple between thumb and forefinger. She gently tugs on the nipple and I can feel B responding. The rhythm of her hips is picking up and she is definitely fucking me harder! The A leans forward and her mouth closes around B’s hard nipple. She sucks hungrily on it! My God! The twins are bi! What a turn-on! How come I have never noticed it in Alison?
Then B begins to tremble lightly. She fucks me harder and then lets out a mighty scream as she comes. She starts to buck uncontrollably! The rhythmic contractions of her pussy on my dick almost push me over the edge as well. She collapses on top of me and I give her time to recover. She gets off me and so does A. I get onto my knees and A kneels in front of me, offering her cunt doggy style. I waste no time in slipping my hard dick into that inviting sopping wet cunt! I start fucking her enthusiastically, but still the uncertainty is killing me!
B lies down on her back in front of A and spreads her legs, offering her hot, wet cunt. A wastes no time and starts to eat B’s pussy with passion. I lean forward and take A’s swinging tits in my hands. I tug on her nipples and roll them between my fingers while fuck her from behind. The sight of my dick pistoning in and out of who knows whose pussy while she’s eating who know who else’s pussy is getting waaayyyy too much for me. My balls feel like they’re going to explode! I grab A’s hips and ram my dick as hard as I can all the way into her cunt and erupts into orgasm! I shoot stream after stream of hot come into her pussy until the come runs out of her pussy and down her thighs. Then I collapse on top of the both of them, totally spent.
They get up, still without saying a word, merely smiling at me. They wade into the water to fetch their bikinis and my trunks from the rock. One of them tosses my trunks in my direction and they start putting on their bikinis, still not talking.
Finally, sanity prevails! I grab Alison and give her a big bear hug. Blanche looks striking as she stands next to the water in her blue bikini. She is brushing her long blonde hair. I walk Alison to the van.
“Jesus, Hon! That was amazing! The best birthday present I ever had!” I said. “But you guys had me so confused I did not know whether I was coming or going! Shit, I never realized that Blanche is such a wildcat!”
“Only goes to show you…” Alison says “Never underestimate anyone. The only thing that you can be sure of is that you cannot be sure of anything!”
We pack everything back into the van and drive back to town, Blanche again sitting in the middle. I sneak peeks down her blue bikini top and decide that she actually has better boobs than Alison. Then I notice the band-aid on her shoulder. “I suppose now that the game is over, there’s no need for this” I say and pull the band-aid off her shoulder. Fuck! What’s this? No mole? They’re shitting me again! They swapped bikinis!
We drive into town with the two girls absolutely hosing themselves at my expense. I cannot help but wonder where my relationship with these two sisters will lead to. One thing is certain, though – this was the greatest birthday of my life!