The bed groaned, rattled, creaked and the mattress springs twanged under our combined weight, as he increased the rapidity of his thrusts. The sounds of our activity were increasingly erotic to me, as we rose and fell together, moaning and panting, with Lilia making ecstatic expressions of delight at what she saw. She placed her hand on my hip, pushing me over towards my left side, I raised my leg and hooked my heel behind his thigh, allowing her an even better view, and increasing my gratification as he plunged in and out of me. My stomach tensed as a ball of tightness grew in my belly, making my bottom pucker in delight at his ministrations. I wrapped my arms around his upper chest, holding him tightly, my fingers digging into the soft muscles under his shoulder blades.
Lilia was beginning to take an active part in what we were all doing together, kissing the side of my buttocks, her hand deep between her thighs as she fingered herself, the rich slippery fluid of her excitement flowing over her knuckles. She reached up between our legs, and gently squeezed his balls, softly massaging his sac, and tickling his under parts, until he flexed his pelvis and threw her hand off.
I was so absorbed by what he was doing to me. Almost helpless under his body as he raised my senses up to a height of ecstasy, I was only partly aware of her changing position and lying alongside me. His head had dropped down to my neck and shoulder as he buried his face, breathing hard, his hot breath flowing around to the back of my shoulders. His hands had slipped slowly down my back, cupping the cheeks of my buttocks, and pulling me apart, enabling his thick base to stretch me wide at the deepest part of each thrust, it was blisteringly good, and I lost control of myself, feeling my body being shaken around underneath him as though I was a soft rag doll.
She kissed me, hard, her tongue probing my lips, and entering my mouth, keeping time with his rhythmic pounding. Her lips disengaged and she kissed her way down to my breast, where she took my nipple and aureole inside her mouth, her teeth rubbing over the sensitive tissue, as she rolled my nipple around with the tip of her tongue.
His voice came from behind my shoulder, muffled and breathless.
“Ooooh, this is wonderful, I never thought I’d be doing this with you, I must be dreaming. Mmmmm, you’re so soft, warm and tight down there, it feels as though my cock is wrapped in warm slippery silk, oh god it’s lovely, oooh Lucy. Oooooh!”
I’d tightened my buttocks and clenched my muscles gripping his penis in a tight warm embrace. Causing him to exclaim at the end of his whispered compliments. In the meantime, his sister had slipped her hand underneath my thighs, and caressing my fourchette, took some of our fluids onto her fingertips, before bringing them to her lips, and tasting the thick rich lubricants.
He’d been thrusting into me for almost 8 or 9 minutes, and after our earlier session he was tiring quickly. Noticing that his tempo was slowing, but becoming deeper and more forceful I knew he was close to his climax. I moved my hands down to his hips, pulling his pelvis closer in towards me. His eyes were bulging from the effort of holding his orgasm back, and I could see the fine sweat beading on his forehead. Lilia had become very still, watching, fascinated by the reactions of both Martin and I. My mouth was open as I moaned loudly, the tight ball of tense muscles feeling as though it was about to explode. My insides felt as though they were being gripped by a large paw, and twisted violently into a vibrant jelly, responding with a sharp delightful stabbing, tingling sensation with each of his powerful thrusts.
His sister watched on, over us, astonished at her brother’s prowess, and at my abject physical helplessness as I succumbed to the physical responses that he was generating within me. She touched my nipple and took a sharp intake of breath at how hard it had become. Observing our activities had made her realise just how good he was and seeing me in the state of almost complete abandon, something she had never seen before, shocked, yet thrilled her to the core. She sighed and moaned at the delight she was experiencing as a witness to what was a really a complete domination of my body by him.
She took pleasure from my helplessness, my inability to control myself, or him, and she laughed gently as she saw my physical contortions, building up to what was going to be a fairly powerful vaginal orgasm for me. I was at his mercy with no control whatsoever over an orgasm that he had mastery over, and one that I realised she’d engineered and enabled on Martin’s behalf.
Holding himself back, he’d managed to pound away in me for almost 15 minutes, and I was almost delirious form the intensity of his sexual perpetration. I reached to point of release, and with a shrill scream, I felt the ball of tension inside me, burst, and flow fiercely through my body, my vulva clenched and flexed, my vaginal canal convulsed and gripped his shaft like a velvet vice, holding him inside as my cervix and uterus jerked and twitched and I experienced a very powerful vaginal ejaculation, flushing my sweet, cloudy white fluids out over the barrel of his cock, soaking his base and scrotal sac, and running in a hot slippery stream, over my perineal skin, and between the body crease of my bottom before soaking into his bedsheets.
He froze, head up eyes tightly closed, as he strained against the warm grip of my vaginal canal, holding me tightly as he pumped pulse after pulse of his powerful ejaculate into my warm receptive body. I lay there under him, marvelling at how much fluid he produced, feeling it trickle down inside the crease of my bum, warm, rich and slippery. His skin stuck to mine, with our perspiration acting like a seal. All the time Lilia was kissing and stroking my breasts and flanks. Clearly enjoying the sight of what he’d done to me.
Slowly but surely, he regained his composure and began to lift himself up from me, our skin parting with a delicious tingle. His penis was still very sensitive, so he was carful as he withdrew from me. I felt a slight sting as his helmet stretched my labia on the way out, and resolved to check myself later to make sure he hadn’t torn me down there.
He rolled off me, and collapsed onto his back, whimpering and shivering from the extreme sensation and emotion of finally having me. I was in no better position, almost completely unable to move, with the warm but powerful pulsing inside me, as wave after wave of post orgasmic feelings swept and roared through my lower body, my uterus squirming and my tummy churning in exuberant delight at what had been generated inside my most feminine of parts.
Lilia scrambled over me, I felt her bush slide featherlike over my stomach, as she moved to his other side, the two of us framing him between our ripe nubile bodies. We lay there slowly recovering our breath and the reduction of our heart rates. With her wrapped around his chest her leg over his hips, and his hand resting gently on my pubic pad, we all three of us fell deeply asleep drained by our joint sexual exertions.