Sam and Tom had now been dating for a few weeks and we were growing closer each day with love and lust.   I had hit up James, her ex, for a coffee and let him know that Sam and I were dating, which he was happy for both of us as he had an inkling how my previous relationship had ended. 

After dinner that night an while eating Christmas Cake, I had confessed my meeting with James to Sam. She pulled herself onto my lap and gave me a long, gentle kiss in approval.  We then finished the cake and, as usual after the cake, she had stood me up and started a gentle kiss.  She then stripped me, allowing me to disrobe her wish gentle, sensual movements, leading into laying me on the ground and sensually kissing and touching me while allowing me to express return feelings as we ate each other while 69-ing and eventually into a slow, sensual love-make and orgasm.  

I wondered whether the cake was the cause of this particularly sensual sexcapade as she loved biting me and getting bitten there by me!

Kate, her flatmate and best friend spent time with us and I our friendship was growing gently.

Sam and I got back from our run.  By now, our runs had generally become pure runs - after our first sex-filled running encounter, although if the opportunity arose, we weren't afraid to rise to it! 

I had previously asked Sam if Kate was seeing anyone.  Sam said she wasn't, but one night after a few drinks, that she had persuaded Kate to go onto the dating sites and hunt for FWB as she was not into hookups.  It turned out that Kate had struck lucky and found Pete, who she'd been out with on a few [vertical and horizontal] dates.

When we got back to their house, we could hear moaning and groaning. 

Tom said, "I didn't think Kate was going to do Pete tonight?" 

Sam said, "Neither did I, but it seems that she is doing him in the lounge." 

I replied, "What happens if one of you catches the other at it?" 

Sam said that it rarely happened, but she went in the back door and fingered herself until Kate was finished.

I hadn't paid much attention to Kate's figure until now, but through the window , I could see Kate riding Pete reverse Cowgill.  Her breasts were probably DDs - a bit smaller than Sam's, and Kate's pussy was shaven - and filled with Pete's sheathed dick.  Looking at them fucking, made my cock grew, and I could see Sam starting to finger herself.

I took Sam by the hand, and we walked round to the kitchen door.  On the way, I asked her how "open" she was with Kate.  She said there were times when they'd been naked in the house - but nothing sexual between them, nor had they snogged.  Emotionally they were completely intimate but sexually they were chaste.

Sam gently unlocked and then opened the door.  We walked in holding hands and gently closed the door.  She took my hand and said, "You said .." and put my hand down her running shorts.  In the background, we could hear them going harder.  My hand found Sam's wet pussy and started rubbing it.  She slid her hand down my shorts, found my hard cock and started stroking it.  Next, she leaned over and put her tongue into my open mouth, and I returned the kiss and started Frenching.  My fingers were probing deeper into her pussy as her hand was stroking my cock harder.

In the background, we could hear Kate's horny moans as Pete fucked her harder. 

Sam said, "Fuck me," undid my shorts ties and then dropped my shorts.  I took my hand out of her pussy and pulled down her shorts.

She pulled off my top, and I reached under her tight top and briefly fondled her tits before lifting it completely off.  Now, we were completely naked against the kitchen wall with the horny pair fucking in the background.

We resumed kissing, and I put my cock against Sam's pussy and started rubbing her wet entrance.  The background fucking noise was getting louder as Kate seemed to be on the verge of cumming - this was turning us on knowing that a couple was fucking nearby. 

Sam stood up a bit higher and guided my cock into her wet pussy.  I dropped down a tad and pushed up. Now my cock was deep in her pussy, my tongue was in her mouth and her nipples were pushing against my chest. Our Frenching deepened as I started thrusting slowly and going deeper. We could hear Kate groaning as she started cumming.  This made us even hornier: my cock was growing, and her pussy started to grip my cock harder.

We heard, "FUCK .. FUCK . FUCK .." as Kate came on Pete. 

Sam kissed me harder, and I thrust deeper and faster.  She kissed me harder, which I returned, and her pussy squeezed my cock.  I thrust deeper and faster and her pussy started squeezing me harder as my balls started to tighten.  She started to moan as her pussy started pulsing my cock.  My balls started twinging as I started to cum into her.  In return, she squeezed my cock and pulsated as she orgasmed.

Just as we finished cumming, Kate walked into the kitchen: naked.  I could see her nipples were erect and that her shaved pussy was dripping with her cum. She yelled out in surprise as she saw Sam and I still doing our post-sex make-out with me still inside her.  I wondered what to do - stay in or come out.

Kate said, "I didn't know you were here," and smiled slyly.

Sam slid off me: her pussy was dripping with my cum, and her nipples were still hard and said, "We heard you and Pete so we went into the kitchen to make out and got carried away."

Kate had turned red by this point.  Sam said, "Why don't we do a couples dinner?" and her finger reached down and scooped out some of my cum from her pussy and she guided it to my mouth. 

Kate looked stunned, and Sam said, "But we stay in our couples when we eat: it's good fun." 

Kate replied, "OK," and called for Pete to come into the kitchen.  He came in and was rather wary of seeing the naked Sam and I, but rather stiffly (unlike a part of his body) introduced himself to us.

We decided to have a shower while they started dinner. We went into the bathroom and then showered together. As the water soothed and cleansed our hot, naked bodies, we started making out again.  My hands started roaming over her wet body and I could feel her nipples harden.  At the same time, she was washing me down and paying good attention to my dick with her hands. I said, "Do we want more now - or wait until dinner and show them?" 

She leant down and kissed my now erect and thickening cock and said, "Dinner."

We left the shower and towelled off.  We walked into the kitchen, naked, and found Kate and Pete also naked, making out in the corner.  We could see Pete's cock growing as she fondled it and her DD nipples bouncing and getting harder.

Sam took me by the cock and led me to the sink.  She leaned in and open-mouth kissed me while moving my cock to her pussy.  I returned the kiss and slid my cock along the outside of her pussy as we Frenched deeper, and my cock started rubbing it.

Her pussy was soon wet due to our making out and my cock's rubbing. She guided me to a chair and leaned over me so her tits were dangling over my mouth. I took one of her tits and started sucking as her hands found my cock and started fondling it. She leaned in, and her wet pussy started rubbing up and down my erect cock as I kept sucking on her growing areolas.

We saw Pete slide into Kate, and she started to moan as he started to fuck her. For a shy person, she was getting more adventurous.

By now, my cock was rock hard, and we were kissing faster. Sam dropped down and slid into me. I looked over and could see them making out harder. Pete was pounding her pussy harder and harder. Seeing them fuck made me harder, and Sam's Frenching and squeezing my cock caused me to get even harder.

Sam was riding me up and down as I fondled her tits. This seemed to be affecting Kate too, as we could hear her increasingly loud moans as Pete pounded her harder. By now, we were Frenching very hard as her pussy squeezed my cock harder.

Kate started groaning, "FUCK .. FUCK .. FUCK," as she started orgasming.

Sam kissed me harder, and I felt her pussy squeezing me as I felt my cock start to twitch as our kissing intensified. Soon, my cock was spasming as I shot my load into her as she moaned and mixed her cum with mine. She gave me a long, passionate kiss which I returned as we came down off our high.

A few minutes later, Kate walked over, her nipples still hard and her open pussy dripping Pete's cum, but her DD nipples were still erect.

My cock started to stiffen at the sight of two sweaty, busty birds with hard nipples and their open, dripping snatches. Maybe, we could switch partners next time?

Kate said to Sam, "screwing in the same room as you two was fun."

Sam said, "Let's really cook dinner this time, then see what's for after's."

Kate just nodded.