It had only been 2 days since I discovered my unknown desire for cock. David had unlocked something that I never knew was inside of me and I could think of nothing else since Wednesday. I had gone home with the clothes he selected for me to wear at the party but did not show the wife through fear that she may want to see me in them and I would get excited. I could not let her see that I felt that way about wearing women's clothing. The past two nights I lay in bed thinking of how David had guided me into a position where he had turned me into his secret cock sucker and as I thought about him I became so hard. Fortunately my wife was not overly demanding in the bedroom and I did not have to perform with her as I did not know how I would be able to, having now been used by David. My biggest concern was for the following night's party where I would be wearing the dress in front of friends. I knew that we would all be 'in the same boat' but they would not know what I had done (and wanted to do again). On the Saturday I had become very nervous as I was getting ready and decided that I would not wear the silky knickers David had given me because the feeling that I would have could very easily made me hard and that would be a major issue at the party. I got dressed as best I could then asked the wife to do the zip and hook for me but I did not get the same excited feeling as when David had done this. She applied some basic makeup not trying to make me look like a woman and I felt quite daft definitely not exciting. We left for the party and I drove getting quite a few looks from people on the way but most of them just laughed at us when they saw the wife with a drawn on tash and beard. When we got there nearly everyone had dressed up so I began to relax more and did not feel such an idiot as I thought I would. The party was quite lively and most of us had forgotten that we were still unconventionally dressed, I was chatting with a couple of friends when the wife pulled my arm and was about to introduce me to her friend Ann and her husband. I nearly died when I heard the voice of her friends husband it was David. I must have gone almost white as I started to sweat while he shook my hand saying "no need for introductions, I already know this young lady", my wife and Ann looked at each other and he explained that he had 'helped' me with my dress on Wednesday in the charity shop with a big grin as we all laughed. I took a big gulp of my drink and steadied myself trying not to show the nerves that were now making my legs shake. We chatted for a while and it turns out that Ann is a customer of the company where my wife works and David is retired and volunteers at the charity shop on Wednesday mornings. Ann and my wife went off to get a some drinks leaving David and me together. He looked me up and down and leaned a little closer to say "I am very disappointed that you are not wearing those silky knickers I gave you" and squeezed my bum winking as he did. "looks like you are going to have to make it up to me" he said. All I could mumble was "how" as I was really shaken by his appearance at the party but I was also getting that excited feeling as David spoke and looked at me making me go red. A little while later we were all in the kitchen when David said "right then, its time for you to make it up to me" when my wife asked why he laughed and said "I helped him on Wednesday, so he can have a quick look at our car as it sounded a little ropey on the way here". Looking a bit 'offish' I replied "dressed like this?" as my wife told me "it wont be a problem look around all the others are still looking as daft as you". "Come on, we'll take it for a quick drive and you can see if you can resolve my problem" David said. I went out to his car getting more nervous as he told me he had been waiting all evening for a chance to get me alone, He got into the drivers seat and started the car. "Get in" he said and I sat in the passenger seat. As he drove off he took my hand and put it between his legs and rubbed it against the large bulge telling me "you have made my cock hard so you will have to sort it out". We drove for a short while and he pulled in to a car park. As the car stopped he pulled me across and started to kiss me like before and with the nerves and excitement I returned his kiss. he was undoing his trousers and pulling his cock from them, I did not need to be told I went straight down on his cock and took it in my mouth. I started to suck it and stroked it as I sucked and licked his hard cock. "Good girl" he said as he pushed my head down to make me take more and more in my mouth. I don't remember how long I had been bent across the car with my head in his lap and my mouth full of his hard cock but I knew he was about to cum as he told me "get ready for a big load, you are going to swallow it all". I felt his cock pushing deeper into my hungry mouth and I was now so excited I wanted him to cum. David forced his cock hard into me and groaned and the his hot cum exploded into my mouth and each time he pumped more hot cum filled my mouth. He held me down on him until he had totally subsided and finished. As I pulled myself off of his cock he kissed me and again pushed his tongue into my mouth. I cleaned my face up on the way back and made sure I did not have his cum over my lips and face before we returned to the party. When we got back the wives were still busy in conversation and nobody said anything. At the end of the night as we were abouth to leave, David said "I'll see you on Wednesday aftrenoon to change the plugs then?" I nodded and told my wife that I was going to sort his car for him. As we left the party, my wife said "looks like you have found a friend there, you will be doing charity work next" as she laughed. Little did she know the type of work I would soon be doing for David nd how much I wanted to do it...