It was my partner Greg's fortieth birthday and I wanted to make his big 'four-o' special. I had arranged a surprise meal at a local restaurant and had purchased an i-pad as a present, something he had been keen on getting for himself.
Although I'm only twenty six years old there has never been any problem with our age difference and we have been together for about eighteen months and living together for just over a year.
On returning to our house I told Greg that I had something special planned for him but he had to agree to go along with it and follow my instructions. Although I could detect a little scepticism mixed with curiosity in his response he agreed to participate.
I took his hand and led him upstairs to our bedroom. The bed had been placed in the centre of the room, with space to walk all round it. It was covered in a large black silk sheet. "Get undressed," I commanded him and Greg started to comply. "No, totally naked." He removed his Kalvin Klein briefs leaving himself completely nude. "Come here." I led him to the bed and got him to lie on his back with his head close to the end and placed a black sleep mask over his eyes. I then got undressed leaving on only my white hold-up stockings.
I returned and knelt at the foot of the bed. I bent forward and whispered in his ear "I love you, relax and enjoy." I started by teasing and tickling him all over his upper body with a feather. I leaned forward and sucked and licked each of his nipples in turn. I then offered each of my small breasts up to his mouth and he sucked and chewed on each of my nipples getting both little buds hard. I lowered my mouth towards his and we were soon exploring each other's mouths with tongues in a passionate kiss. I then felt his body shudder and I knew that another part of my surprise was taking shape.
Our lips parted "Shush not a word. I've got more important work for your mouth." I stood up and kneeling on the bed either side of his head, facing his feet, I positioned my pussy over his mouth. Greg required no further instructions and began tonguing my slit and probing into my love hole.Greg gave me an expert service before I reached behind me and removed the mask, raising myself off him. He now had clear sight of what had caused his body to judder earlier. He could see my younger sister Sam with her mouth fixed firmly over his by now hard cock.
"What's she doing?" Greg said in a surprised voice.
"She's prepping you so that you'll be ready to take her. I know that you like her and she secretly fancies you. What's more I'm looking forward to watching you do her."
"Does Sam want to be done?"
"I certainly do, that's why I'm here and it is your birthday."
"And are you really O.K with this Claire?"
"Perfectly fine. I'm responsible for setting it up after all. I want you to enjoy her, just make sure you make her cum."
Greg got off the bed and taking Sam's hand he helped her to her feet. They were standing facing each other Greg with his wonderful semi hard fat cock sticking out and Sam nude, having undressed before entering the room, except for her white hold-ups matching mine. I could see Greg studying the curves of her breasts and down to the area of her totally shaved pussy. He looked over towards me and smiled his approval of what he could see in front of him. I could tell they were both rather nervous and this added to the feeling of anticipation that I had.
Greg put his hands out and squeezed each of Sam's breasts feeling the firmness of her young flesh before starting to role both nipples between thumb and forefinger. Sam's breasts are slightly bigger than mine but still small with long thick nipples, unlike my tiny buds. Sam was enjoying it and Greg's cock was now resting in the palm of one of her hands and his balls were being gently caressed by the other. She circled her fingers round his meat and started sliding over his shaft pulling his foreskin very slowly backwards and forwards. I could see the head of his cock being exposed out of the end of her fist each time she pulled back.
Greg reached out and drew Sam closer to him cuddling her and squashing her breasts against his chest. His hands were now behind her squeezing and fondling her bum cheeks. She has a gorgeous little bubble butt and I'd positioned myself so I could see Greg pulling her cheeks apart showing her pretty pink anal ring. One of his hands worked its way between her legs, from the front. In order to make it easier he lifted one of her legs placing her foot on the bed. Her legs were now nice and open. The fingers of his hand were either side of her pussy lips sliding back and forth occasionally pulling them open a little.
Greg got to his knees and holding her pussy open with both hands he proceeded to lick and tongue his way along her slit. The room was filled with the lapping sound of Greg's action and the deep breathing and sporadic moans emanating from Sam.
After a while Greg stood up and getting Sam to sit on the end of the bed he coaxed her legs wide open then pushing them back either side of her head he lowered his mouth and started eating her pussy again. I could see he was licking her slit, pushing his tongue into her love hole and sucking on her clit. He was breathing heavily with the effort he was putting in to satisfy her. Sam was moaning louder and more often and then it became continuous until she was screaming as Greg made her climax hard and long.
Greg continued a gentle soft licking of her pussy as she slowly came back down and he savoured all her love juice. I noticed that my own breathing had become deep and I realised I had become extremely excited watching my partner making my sister cum. I'd enjoyed it nearly as much as them.
Greg whispered into Sam's ear, I couldn't hear what was said, but following on she positioned herself kneeling on the bed. Standing on the floor behind her Greg held her hips and pulled her closer to the edge. His cock was still fully hard and I knew the time had come for me to watch my younger sister being taken by my partner. I had butterflies in my stomach and I was keyed up at the thought of what was about to happen. Holding his cock in one hand he pulled her pussy open with the other and started stroking the tip and head along her moist looking slit until he stopped with it at the entrance to her cunt. He pushed forward a little and the head disappeared inside her and without pause he continued to slowly slide his thick meat into her until she'd taken it all.
"Ooh! Oooh! Ooooh! That feels good." Sam shouted, obviously enjoying the experience.
I suddenly realised that I had, subconsciously, started to diddle myself in response to the action unfolding in front of me.
Greg started to ease his cock out slowly before unhurriedly pushing it back in. He had started to fuck Sam for real. Both of them matched each other with gentle grunts, groans and sighs of pleasure on each inward stroke. Greg was into a steady lazy rhythm which he kept up for quite a while and they both used the time to take pleasure in the sensations they were clearly experiencing. I found that I was frigging myself in time with their tempo. I had had one or two anxious thoughts about how I might feel in the situation prior to the night but was pleasantly surprised as to how horny I was getting in my voyeuristic role.
Gradually Greg began to increase his pace and with it the vigour with which he was fucking Sam. He was driving his cock as deep as possible into her. She was responding by pushing her bottom back to meet each penetrating thrust. The sweat running down Greg's back and the heavy breathing was testament to the effort he was putting in. Sam was groaning louder and becoming more vocal. "Oh yes Greg!"................. "Mmmm more, more, more."........................"Oh shit! Don't stop! Don't stop! You're making me cum! Ooooooooooooh!" She shrieked as a massive orgasm ripped through her body and her hips jerked uncontrollably trying to get as much of Greg inside her.
Greg held her with his arms under her waist for support until she'd stopped twitching. He gradually withdrew his semi-hard cock and gently lowered her body until she was lying face down on the bed. Greg lay down next to her and was stroking her hair and down her spine as she recovered. Bit by bit her breathing slowed and became less noticeable. She turned to look at Greg "Thank you that was incredible," she said quietly.
"Do you feel up to taking some more?" Greg enquired.
"Mmmm please," she replied a little listlessly.
