All our neighbours and friends thought Chris was our lodger. Everyone said we were the perfect couple and no one would have guessed that Anne had a live-in lover! As a teacher her reputation was precious and we took care not to make our relationship public.  Anne came to me one day seeking advice. The diaphragm that she had been prescribed was not working. Chris' baseball bat penis (his name not mine) was pushing Anne's diaphragm aside each  time they made love and Anne was worried that, with all the sex they were having, she could easily conceive. I suggested that she should encourage Chris to wear a condom but Anne thought he would reject the idea. We had used condoms in previous times and Anne disliked them too especially after one had slipped off  inside her and she had to have it removed at the surgery. I found them difficult to keep on as my erection often slackened  during sex. I  asked Anne whether she would like to consult the Doctor and ask her advice. She told Chris and to my surprise he he offered to accompany her. I went along too so that I could explain our unusual relationship. Megan our G.P. was very kind and supportive as I outlined the problem, Anne being too shy to explain for herself. Doctor Megan said condoms were the best answer and that it was unlikely it would slip off if what I had said was accurate about the size of Mr Davies' penis. Unable to convince Chris, the doctor prescribed a more robust diaphragm which needed to be placed carefully near to the cervix prior to having sex. The G.P. said that training was available on the National Health for partners to learn how it was to be inserted. Chris couldn't go so I went along and learned what to do. It meant that each time they had sex I had to get Anne ready. So most afternoons straight after work Anne had her legs open on the bed and I pushed the diaphragm into place so that Anne was ready when Chris came home from work. I would finish by smoothing some spermicidal cream onto my wife's vagina. Each time I did this I got hard and I often pleaded her to have sex with me but Anne said that it would not be fair on Chris. It was still a treat to see her beautiful red pubic hair and her delightful mound ...  that bulge especially when she had put her knickers back on. Anyway it worked and Anne was worried no more about getting pregnant.  Anne got promoted and moved to another school. We moved home and this time we were careful not to live and work in the same village. Chris of course came along with us. We made new friends and no longer needed to make out that Chris was our lodger. It was much easier to stop all the guessing by being honest. I would introduce myself as Anne's husband and Chris as Anne's boyfriend. This raised a few eyebrows but we got by and eventually neighbours accepted us as a three. Linda, our next door neighbour was jealous and told Anne how lucky she was to have a kind husband and a well fit boy friend. Anne never mentioned that she only had sex with Chris and she let Linda imagine what she wanted. Linda was about our age thirty one, married with two kids. She loved to wear low cut tops and tight skirts to show off her fleshy bubble of a bum. Anne told me to make a move on Linda  and  I noticed how close to me she would stand  when I talked with her. I could feel the heat from her inviting torso once when she showed me some paintings she had hung in the upstairs hallway that  she had recently redecorated. She was a bit a of a flirt but her husband was my friend and in any case it was Chris she was trawling for, not me. Chris made a point of chatting to her over the back fence and I later found out that Anne had asked him to do this to get me and Linda together. Chris invited Linda over for a drink and she readily agreed. Anne then explained about my shortage of sex and asked whether Linda was interested. Linda gave no promises but said she would  thunk about it. The conversation flowed almost as well as the champagne I had brought. Anne explained that she had met Chris at a swingers' party and Linda was intrigued. Chris said that the best way to understand was to try it herself and that here now is the best place to start. Chris told us all to get our kit off and Linda was the first to respond and within a few minutes we all were naked in our lounge. Anne broke the ice and sat on Chris's cock and Linda marvelled at the easy way his long shaft penetrated her. I presented Linda with my cock but she only had eyes on one very large, very hard thing! Chris saw what Linda  was looking at  and waved his baseball bat at Linda and boasted "Stand up and have a suck, you can use it for balance."  Anne pretended to slap Chris' face and pulled him between he legs. Linda stroked my cock but her heart was not in it and soon as Anne had climaxed she pushed Anne aside and lowered her pussy onto Chris. Anne was not happy one bit and pleaded with me to stop them. By that time Linda was on all fours and Chris was humping her hard. Chris came inside Linda and Anne started to cry and ran upstairs. I followed to console her but Anne was distraught and wanted me to get Chris upstairs. I left Anne on the bed naked and went to fetch Chris who, having recovered was on top of Linda giving her a good pounding.  "Please Chris! Go talk to Anne!" Chris was reluctant and he was obviously very happy be where he was - between Linda's fleshy thighs and I got so annoyed that Chris finally said he would. He quickened the pace of his thrusts and came  deep inside Linda. Chris went upstairs  and soon I heard the familiar sound of the bed creaking and Anne moaning gently. Linda felt sorry for me.  Naked and still dribbling with Chris' cum...she sat on my lap, cuddled me and put her hand on my knee. Linda moved as to get more comfortable. "Oh ouch ... Jesus he was big!" At the local pub that evening I found myself  feeling proud of my wife and my neighbour.  I had brought about two deeply satisfied  girls. They were sitting close together ...  purring. Linda and Anne started giggling about how "squishy" their fannies felt. Anne said " I'm glad I have not got shorts on ... it is running down my legs!" How embarrassing! Linda said she was the same but she was sore. Anne told her that she used to be like that in the early days with Chris. They had obviously made up, to share such secrets.  "Next time ... Linda ...look after my husband better" and Anne winked at me.