My wife Lynda and I have been together for a long time, she is lovely but has always lacked confidence, it's crazy but she's sure that no-one would find her attractive.This idea has made her shy in sex though she is very responsive. It came about ,some time ago, that the thought of me with another woman turned her on. It seems that her first serious boyfriend, a soldier , would let her know of his conquests while away, she was 17 but he'd worked out how to get his fingers in her knickers. I was working on a contract and a girl at work asked if she could stay at our place ( we lived on the coast) , Lynda said ok when I asked. Emma , her name, came for the weekend, everyone became great friends. She came back on another occasion and one thing led to another, I remembered what Lynda liked and it suited me as well . Emma and I began kissing, over a glass of wine, she wasn't sure as Lynda was sat in the sitting room with us. I whispered in Emma's ear that Lynda was happy , Emma has no hang ups and so in no time we were engaged in some very pleasurable petting. As I was gently slipping my fingers in and out of Emma I looked at Lynda , I had no wish to leave her out, and I noticed that she was really flushed and smiling at me, she said "That looks fun". I kissed Emma , got up and went to Lynda , then she surprised me . Normally ,with her poor confidence, she likes lights off and no looking. This time the sitting room was lit and I went to her and stood her up. she was luckily in a skirt so I thought in for a penny, and took down her knickers. She stepped out without argument and I bent her over the arm of the sofa. Now I discovered how turned on she was, she's known for being well lubricated but never so much as this. I easily put my cock into her , she almost sucked me in , it was then that I found that our guest was involved. She was sat on the sofa facing my wife and stroking her hair. Then I saw her undo Lynda's blouse and pull her breasts from the bra. She began fingering Lynda's nipples and then kissed her. By this time I'm not sure that Lynda was fully aware, I knew they were kissing deeply , she was moaning and I said quietly to Emma that Lynda loves her nipples treated roughly when she is really turned on. The noises got louder and I began to think I was riding a winner in the National. I could feel movement around Lynda's cunt that I knew wasn't me , Emma came up for air and said "I've got her clit". Lynda came hard and collapsed, the first thing she said when she got her breath back was "I'm not gay" and we laughed. We went to bed together and I finally fucked Emma, but all the time I managed to finger my wife. When I saw Emma at work that week she asked to come for another weekend and added," I'm not gay either but I really fancy Lynda", all I could say to that was "Carry on". It was not difficult on the Saturday night to pretend that I had to meet someone to discuss some business thus leaving them alone, "Lynda said don't be long, Emma's your guest". I went to the pub for a beer and left them for about 45 mins. It was winter and cold out, when I returned the lights in the sitting room were lower and I could tell that the log fire was lit. I walked into the room. Lynda was on her back on the sofa, her skirt up round her waist and her legs spread wide. Emma was naked except for a shirt , she was kneeling on the floor and her tongue was buried in Lynda's cunt while her hands were squeezing Lynda's arse hard ( I'd told Emma that was a turn on). Not to be left out I undid Lynda's blouse and released her tits , I intended having a great time and began deep kissing her. It's great when you don't have to work too hard to get your wife writhing under you until she blows her mind and cums. The pair of them were laughing together so I said let's go to bed . Lynda said I want to do something but it's the first time and I don't know how. Emma said do what you like , and I said "Think what you like and try that". So for the next couple of hours the two of them were kissing and fingering, with the occasional orgasm, meanwhile when a target offered I slipped my cock into any hole that was free. We slept but in the morning no-one was aware that I was awake, through half open eyelids I watched Emma finger Lynda again and she came almost immediately, proving to me that women know exactly what other women like.