Wife is secured and fucked

After many years of fucking other men while I secretly watched, my wife Cherry mentioned that she would one day liked to be safely sub-missed by another man while I was in the room watching. The idea of not being in control appealed to her and now that I knew it was a fantasy of hers I was keen to find an opportunity to make it a reality. That was almost 18 months ago and it was proving to be a challenge until now.
I had recently discovered that one of my work colleagues and his wife were into bondage and had set a whole room in their house up with all manner of sex swings and ropes etc. I constantly quizzed Phil about his set up and told him that I would love to see it one day. He was more than happy to show me the room and when I told him that it was a fantasy of Cherry's he asked if we would like to visit for dinner on the weekend and we could both take a look. He said his wife Donna would love to meet us both and so we arranged to go to their house on Saturday night.
I didn't mention anything to Cherry about the sex room as I didn't want to freak her out or make her feel uncomfortable. When the day came, we got dressed casually and drove to Phil's house where all got along very well and enjoyed a lovely dinner and a few too many drinks. Eventually I dropped a hint about the famous "dungeon" and Phil asked if we would like to see it. Cherry was a little surprised but also genuinely curious and said that we would love to take a look. We followed Phil and Donna down the hallway and he opened a door and led us into the room. It was quite large and has been fully converted into a room built for tying people up. There was a large frame in the middle of the room and the walls were lined with various frames and wall eyelets and modified chairs and benches. They gave us a tour, explaining what all of the items were used for until we were left standing beside the large frame which Donna told us how it was used to tie hands above head and also could be used as a sex swing. She pointed to the two hand grips in the center of the frame and explained that that was where hands went and were then tied in place.
Cherry was intrigued and mentioned that she was fascinated by how it worked and asked if she could try it out. Donna motioned her toward the center of the frame and said of course. Cherry reached up and put her fingers through the handles and held one grip in each hand. Donna asked if she wanted to be tied in and Cherry said she would. Donna and Phil bound her wrists and pulled ropes through pulleys until her arms were secured. I asked Cherry how it felt and she said it was comfortable and she felt completely helpless in this position. Donna laughed and told us that the thrill was in being dominated while being helpless. Cherry asked what would Phil do next if it was Donna in the frame and Phil said he would put her in an ankle bar and asked if Cherry wanted to try it. She said yes and Phil retrieved a metal bar that he then strapped it to one of her ankles and gently pushed her feet wide apart and secured the other leg so she could no longer close her feet together.
I could see that Cherry was beginning to enjoy this and sensed that Phil and Donna were also enjoying themselves. Cherry was a beautiful blonde with d cup tits and a magnetic smile that made her very attractive. Donna was little taller than Cherry and had a flat chest but was still an attractive woman.
Donna stood behind Cherry and ran her hands up her hips and around and up over her tits and asked how she was feeling. Cherry looked nervous but didn't ask Donna to stop. Donna ran her hands back down her hips and took her t shirt in both hands and pulled it up over Cherry's head and up her arms until she could hook it over the hand grips. Cherry was now standing there in her bra and skirt while the rest of us took gazed at her now heaving chest.
Phil has walked around behind Cherry and placed his hands on her bra clasp and then looked at me for approval. I nodded in silence and watched as the clip was freed and her bra lifter over her arms and up with her shirt. Cherry's big tits hung freely until Phil's hands cupped them and squeezed them gently. Donna pulled Cherry's short shirt up over her hips and took a pair of scissors and cut the thin pantie straps before pulling her panties away, revealing her shaved pussy mound. Phil was now sucking on her tits as Donna went to a drawer and came back with a large vibrator that she turned on and pressed against Cherry's naked cunt. Cherry was helpless to resist and soon was in convulsing with orgasm against the big head of the vibrator.
Phil and Donna let Cherry regain her composure a little and then told her that she was going to be moved to another device now and then tied a blindfold on her as they undid her restraints and led her to a bench against the wall. Donna pulled a saddle looking thing from under the bench and placed it on top of the surface before clipping a short fat latex cock to it. They helped Cherry onto the bench top and locked a bar through her elbows and lowered her onto the saddle device with Donna guiding the cock inside Cherry's pussy. When she was fully onto it they locked the bar in place and Phil slowly turned the elect knob on the machine until it hummed and I could see the cock vibrating Cherry's wet pussy. Helpless against the machine Cherry rode it until she orgasm-ed once again. While Phil was freeing Cherry from the machine and helping her off the bench Donna had been altering the frame once more. She had secured one end of a mat to two chains and the other end to two ropes that were fed through pulleys. She worked the ropes expertly and I could now see that it was a sex swing being prepared. As Phil walked Cherry to the swing Donna asked me to back up against a wall rack right beside the swing and I watched as she shackled my hands to the rack. Donna then helped Cherry onto the swing and roped her ankles up against the swing ropes and tied her hands to he ropes at the head end of the swings. She was secured fast with her legs wide apart and could not move at all.
Phil had undressed and held his fat hard cock in his hand as he stood between Cherrys legs. Donna had undone my pants and dropped them to my ankles and was stroking my hard on as we both watched Phil move forward and position his cock at the entrance to Cherrys wet hole. Cherry was still blindfolded and could not see any of what was taking place. Phils cock pushed its way into her pussy slowly until it was gone from site. He fed it in and out of her slowly as she laid there completely at the mercy of his cock. Donna had dropped to her knees and was sucking me off as her husband screwed my wife. Phil held the vibrator against Cherrys cunt again as her continued fucking her until she came for the third time. I couldn't hold back once I saw her writhing on the swing and shot my seed into Donna's hungry mouth watching as she swallowed the load hungrily. I watched on thinking I would see Phil dump his load into Cherry but he had pulled out and undid the ties holding Cherry down and helped her out of the swing and helped Donna get on it. She spread her legs voluntarily and Cherry and I watched as Phil fucked his own wife right before our eyes until they came together. Cherry had walked over as they fucked and strapped Donna in to the swing and as Phil pulled out Cherry motioned for me to put my cock into Donna. I moved between her legs and Cherry stoked me hard again and guided my shaft into Phil's wife and watched as I fucked her hard until dumping my second load for the night into Donna, this time inside her sloppy snatch.
All completely drained, we dressed and finished a couple more drinks before agreeing to meet again and try a few more items in the room.
For now Cherry had her fantasy fulfilled and loved every minute of it.