Sorry it's been so long since my last post but work and other things took over....here is part 4. Sarah and I had both cum and were now on the sofa naked chilling and waiting for Chris and Claire to get busy and fuck each other to orgasm. Chris wasted no time and positioned Claire on all fours and started to fuck her pussy. I knew it wouldn't be long before he would want to fuck Claire in the arse and waited for the moment when he would ask her if it was ok. Sarah was getting vocal telling Chris to "fuck her hard" and "give her arse a smack". Claire was going with it and every few thrusts Chris would give Claire's arse a light smack to which Claire gave no reaction other than to let Chris carry on fucking and spanking her. Chris then siad " I so wanna fuck your arse" Sarah then got up from the sofa and kneeled next to Claire. "Go on Claire, let him. You'll love it". "ok" said Claire "but use plenty of lube and stop if I say stop" In an instant Chris was lubing his cock and putting plent on Claires arsehole. My cock was rock hard again and both Sarah and myself were now transfixed on Chris's cock easing into Claire's arse. "oh yea" said Sarah "look at that" Claire seemed fine as Chris eased all the way in. The lube was working and Claire's arse cheeks were spread apart for a great vision of her cock filled arse. "you ok babes" I asked. "yea, I'm ok, it's fine" said Claire between heavy breaths. Chris picked up pace and started to fuck Claire's arse harder and faster. With lots of oohs and aahhhs Claire took her arse fucking like a pro. Her arse cheeks were rippling with each thrust and her tits were swing swaying beautifully. Sarah couldn't take her eyes off of the action and her face couldn't hide the fact that she had planned this and wanted to see Claire take Chris's cock in her arse. I figured it was time to join the actiona again so I walked towards Sarah, when she turned to look round I put my cock straight into her mouth. Sarah sucked away and I made her deep throat me, taking my cock all the way into her slut mouth. I pulled my cock from her mouth and told her to get on all fours so that she was face to face with Claire. Sarah knew what was coming and did as she was told. I picked up the lube and gave my cock a generous coating before doing the same to Sarah's waiting arsehole. Knowing Sarah was no stranger to a good arse fucking I decided I would go in hard and all the way. I touched the head of my cock onto Sarah's arsehole and pushed hard until I was all the way in. Sarah gave a huge sigh but no word of complaint. Claire was still taking a good arse fucking of her own and showed no sign for concern. I told Sarah to give me her hands. Sarah complied and put her hands behind her back and I took her wrists. I then started to fuck Sarah in the arse as hard as I could. What a moment. Both wives naked with another mans cock in thier arses. I was fucking Sarah and our naked skin was making that lovely light slapping sound each time I thrust in and made contact with her arse cheeks. Sarah was moaning and making lot's of ahhh sounds of her own. At that moment Chris said he was going to cum. Chris then pulled out and shot a huge wad of cum over Claire's back and arse cheeks. I kept going and continued to fuck Sarah's arse for all I was worth. I knew I wasn't going to last much longer so gave her a few smacks on her arse cheeks before pulling out and with great care aimed my cock and shot cum straight onto Sarah's freshly fucked arsehole. It hit dead centre and started to run down her arse onto her pussy. Chris was rubbing his cock and cum over Claire's arse cheeks. He then moved to Claire's mouth and without any words Claire started to lick and clean Chris's cock with her mouth. With Sarah still on all fours and using my middle finger I stuck it into Sarah's arse making sure some of my cum went in as well. Sarah didn't protest in any way so I slowly eased my finger in and out. I then took my finger out and told Sarah to clean my cock. Sarah spun round on her knees and greedily licked and sucked my cock clean. Claire was now lying on her front resting with Chris laying next to her on his side running his hands up and down her naked body. Chris asked Sarah to "come here" Sarah went over and Chris told her to turn round. Sarah turned round and showed Chris her arse with my cum still on her cheeks slowly drying. I asked Claire if she was ok. "I'm fine, quite enjoyed it actually, will have to do it again some time" After that we chatted and decided we would keep things going and do it again. I will get to the next chapter soon.