Pru and I got married straight out of University. She was just six months my junior. I had managed to get a reasonable job, but Pru was struggling to get anything worth taking. She was also taking a photographic course to increase her skills and her chances of work. Until she did we were struggling for money. Then during one of her lessons she heard that they were struggling to get models for the drawing and painting group. Pru suggested to me that she could earn a little bit to help out and it was also cash in hand and wouldn't affect her unemployment benefits. Pru has a cracking body even now, but in those days it was to die for. There was lots of students that did it to supplement their incomes and Pru stressed that it was all controlled and professional. Besides she explained I go naked on a beach. That was true even if it was usually abroad. While I was a little reluctant I agreed she could do it. After her first sitting she came home on a high and almost ripped my clothes off of me. It was the best sex we had in a while. The second session was pretty similar and we were also feeling the advantages of a little extra money. When Pru got home from the third session she said that she had been asked if she would like more sessions, but with the photography group. I couldn't see that it was much difference to being drawn or painted so I agreed. Pru was quite late getting in from her first photographic sitting and again she was high and we fucked like crazy. The following week I decided that I would drive up and collect her after her session so she wasn't so late getting home. I got there a little early and parked in the carpark. It was pretty dark as the carpark isn't lit. I watched the people leaving. Most were in their forties. Pru still hadn't come out, and there was only two cars left in the carpark, so I went to see what was keeping her. I wandered in and followed the lit areas and as I got closer I could hear Pru groaning. When I peeked around the final doorway I had a shock. A young lad just a little older then Pru had his cock in her face and between groans she would suck him. Then behind her was a man definitely older probably mid forties, he was fucking her with hard thrusts. I watched for a while and the man fucking her was groaning as he started to cum in my wife. I slipped away and went home, struggling with a serious hard on. Pru got home and practically raped me. I was left wondering If I should tell Pru what I had seen, but my curiosity got the better of me and I decided to go again when her next session was and see what happened. Again I waited until all the main class had left. I again crept in to see Pru sucking the same lad, but a different man fucking her. She was groaning very loudly and as they moved a little I could see why. I couldn't see that length as most of it was buried in Pru's pussy, but I could see that his cock was particularly thick. No wonder Pru was moaning. I rushed home and waited for Pru to get home. How different her pussy felt as I fucked her that night. Talk about waving a banana in a tunnel. It was a real sloppy loose fuck. The following week she was again fucked, by a different man again, as she sucked the lads cock. As we lay in bed after another good fucking, I told Pru not to get upset, but I had seen her fucking the three men and sucking the lads cock. Pru went very quiet for a few minutes until I played with her pussy again and told her how much it had excited me. We had another great fuck. The next week I joined them as Pru sucked the lecturer and let one of the students fuck her. As soon as he finished I took his place for sloppy seconds. Unfortunately there was only three more sessions to that term. By the end of term Pru had fucked the majority of the students, well the men that was, not the three ladies that attended. After the man had finished fucking Pru, and gone at the last session, I fucked Pru. Then the lecturer told Pru that he ran his own private video lessons and he was looking for a model for some of those sessions. Pru looked at me and I told her to go for it. Two weeks later I attended the session with her and the men, it was all men, had scripted a plot they wanted her to act. Needless to say it involved getting naked and getting fucked. Pru again sucked the lecturer and one of the men. The other four men, when not filming her, took turns fucking her as did I. The day after that session Pru got a job. It was one of the student photographers from her earlier sessions. He took Pru on as a temporary P.A. Once or twice a week he would send her home to me well and truly fucked. I would give her a another fucking as she told me all about it. She still did the occasional photographic session, but never did any more video work. As far as I know she never did fuck the lecturer, but he had plenty of BJ's. That lasted for around five years and then she finally got work in the field she had trained in at uni. The photography sessions ceased to be funded and stopped as did the private video sessions. With Pru's new job she couldn't afford to be outed so it all stopped and then a few years later we started a family. After our third child she was told it was too risky for her to have any more children, so a few days after the birth she was sterilized. Once she was over the birth and the operation, she became far more randy than she had ever been. To remain anonymous we had to go in for swapping with other professional couples. Whilst I enjoyed the other women I really just wanted to get Pru home to get some sloppy seconds. That went on for a long time, in fact until Pru was in her mid fifties, when she just decided that she didn't want to do it any more. I was also restricted to just three or four times a month. How I miss those day when we were skint but enjoyed ourselves and I enjoyed watching others enjoying Pru.