His left hand slipped between my thighs and his middle finger began to push at my rose as I humped forward into his well-practiced mouth. As I withdrew from his soft sucking I felt his finger slip past my sphincter and push against my prostate.
Not wanting to end our fun just yet, I reluctantly pulled away and leaned down to kiss him, noticing the faint taste of my cock on his lips. "You know turnabout is foreplay," I punned as I pushed him back to lie on the bed. He moved to the center of the broad mattress and I stretched out along side his hard body, my feet toward his head in the classic 69 position. As his rigid meat began to thrust into my mouth I realized it had been several years since I had been with a man and briefly wondered why I had refrained so long from something I so enjoyed. My speculation was quickly interrupted by the feel of his tongue lapping my sensitive head and I began to concentrate on returning the pleasure I was receiving. I felt his finger probing for my prostate again and I momentarily stopped sucking to wet my own middle finger and slip it inside his body to before I resumed my oral caress.
Given our stoned condition and the amount of stimulation we had already endured, it was not surprising that our show for Kathleen was short-lived. He wasn't quite over the top when I tense then began flooding his mouth with the salty taste of my sperm. Giving me his full attention had apparently allowed his own excitement to abate and he was able to save his climax for future application as I rolled away to lay on my back panting.
When I had recovered somewhat I looked over at Kathleen and saw a vacant stare as she slumped in her chair also gasping for breath, her hand buried between her full, glistening thighs.
"Ready to play?" I asked when she seemed coherent enough to understand my question.
She grinned and nodded so I got up and went over to her. Taking her hands in mine I pulled her to her feet and my arms encircled her soft flesh as she slipped her hands around my neck and laid her cheek on my breast. Amazed at her sudden tenderness, I whispered in her ear, "I've never seen a live brother and sister act before. Why don't you two put on a show for me while I rest a while.
Looking up, she smiled lasciviously than slid from my arms and moved toward the bed. Going around to the far side to keep from obstructing my view, Kathleen crawled up onto the broad mattress, looked over and grinned at me then lowered her head and locked her lips around the purple head of her brother's rampant cock which was still glistening with my saliva. As she began to move her mouth up and down, Marc reached around her massive rear. She suddenly stiffened and I assumed he must have found his target. She reached up with her own hand to grasp the base of the veined monster she was sucking and began to stroke the lower shaft where her lips could not reach.
After several minutes of such intense stimulation both siblings were ready to explode but with the impeccable timing which she always seemed to display, Kathleeen suddenly sat back on her haunches then turned to lay down on her back beside her brother's muscular body. As she drew her knees to her chest in obvious invitation, he slid between the soft pillars of her thighs and, holding his torso up with his arms, drove his cock between her swollen red labia and deep into her pussy in a single thrust. It occurred to me that the ease with which he penetrated her attested to the considerable practice they must have had together.
Watching a bull like Marc in full charge was not only erotic but sensual as well. The movement of his rapidly pistoning loins caused his tightly muscled buttocks to bunch with every thrust, each collision of their bodies sending ripples undulating through his sister's sweating rolls of flesh. Her massive breasts rose then flopped audibly back against her chest with each lunge of his hips.
Between grunts forced from her by what must have been the impacts of his cock against her cervix, Kathleen would yell out obscenities, goading him on in his mindless race to climax. His thrusts became shorter and deeper. Finally, with one final lunge, he held his hips tight against his sister's, quivering as he ejaculated his incestuous sperm deep into her receptive body while she screamed out her own release.
Marc collapsed into his sister's soft flesh and she wrapped her dimpled arms around his head. Cradling his cheek against her heaving breasts, the two exhausted sexual athletes lay gasping for air. Finally his fallen warrior slipped from her body and he rolled off to lay in the crook of her arm, his head still pillowed on her massive breast, his muscular thigh resting atop her soft bulging one.
When Kathleen had first started sucking her brother's cock, I felt my own rapidly returning to service but in watching the siblings in the heat of combat, I became so awed by the intensity of their tryst that my lust had abated. As a result, I was as flacid as Marc when she opened her eyes and looked over at me then held her free arm up in invitation to join them. Crawling up on the bed, I leaned across Kathleen for a quick kiss from Marc then buried my face against her unoccupied breast and settled against her enveloping softness.
---=== 000 ===---
Still well buzzed from our earlier communion with Kathleen's pipe, I was gently roused from my slumbers by a tongue and a pair soft lips gently caressing the glans of my still flacid but very sensative cock which was responding faster than my fuzzy brain.
Looked down, I saw Marc watching my face, his lips clasped below the corona of my rapidly growing hardon, his tongue swirling around the nerve-filled glans. When I laid my head back against the pillow to enjoy the best blowjob I could remember, Kathleen rolled over against me offering a nipple to nibble upon as she smothered me in mammoth pillows of titflesh. I inhaled as much of her breast as I could and settled back, nursing and being nursed, one of the more soothing experiences I can ever remember having had as an adult. My torpor and the slow, gentle caress of Marc's talented mouth kept me from becoming too excited as I lay in heaven.
After several minutes of such sensuous attention, Marc's mouth lifted, leaving my flagpole waving in the cool evening tradewinds. Kathleen gently eased her breast from my lips and leaned down to replace Marc's mouth with her own, stretching her large soft body out on top of mine to present the matted blond curls of her pussy to my mouth. I hesitated for a second as I remembered that she was still full of her brother's sperm but then it occurred to me that I had been prepared to take his spunk directly for the source, why should I be squeamish about receiving it from her vagina, a place I had had my mouth numerous times in the past several weeks. Burrowing in to her succulent flesh, I discovered that I rather relished the unique flavor of their combined juices.
Intent on giving as much pleasure as I was receiving, I forgot about Marc until I felt his shaft graze my forehead then move down across my face to ease between Kathleen's swollen pussy lips. I pulled my head back and began to make broad sweeps of my tongue along the underside of his shaft as it smoothly pistoned in and our of his sister's body. After a few strokes he withdrew and dipped his head into my waiting mouth. A few strokes later he slipped back into the wriggling pussy again.
After alternating back and forth for a few minutes, Marc pulled away. Kathleen raised up, reversed her position, and squatted over me, sliding her wet pussy down over my cock until I felt the tip nudging her cervix. Without apparent communication, Marc moved around behind his sister's massive buttocks and as she held herself still on my cock, he eased his substantial pole into her ass. I watched her face as he worked his way into her rear passage expecting to see at least a grimace but all I saw was a lewd grin as she felt his cock enter her body. When he was fully seated, he began thrusting, causing delightful feelings in my own organ as the head of his cock massaged along the shaft of mine through the thin membrane separating Kathleen's two passages. She leaned down enabling me to capture a mouthful of pendulous breast as she swayed in time to her brother's thrusts. Finally I felt Marc stiffen and heard his moan as he emptied a second load of sperm into his sister's body.
With a final volley of thrusts, he finished his attack and pulled free, rolling off to lay watching as Kathleen and I continued to fuck. When he had regained his breath, he again moved behind us. Still without speaking, she raised her pussy off my rod long enough for Marc to give me a few sucks than assist Kathleen as she moved forward slightly to accept my cock into her cum-filled ass while Marc held me on target. Given her recent reaming and the load of cum she already had in her ass, I was surprise at the friction she generated as she began to grind on my cock. Her movements combined with Marc's finger massage of my prostate and gently fondling of my balls soon caused me to deposit my own load of sperm deep into Kathleen's talented ass.