It was quite a few years ago when I was transferred to Arizona to work on a 4 month project. My wife moved to Arizona with me but elected to attend classes at a college in Tucson while I was working down in Bisbee. My company furnished a small studio apartment in Bisbee and Pam got an apartment in Tucson, where I'd spend the weekends with her.
Pam and I had discussed swinging a few times but there was little hope on my part that she would ever go along with it after her very vocal opposition to it. The only thing she was even remotely interested in was a slight fantasy of her and another guy. She was too jealous to let me play around and it wasn't really something I was interested in anyway.
I'd been in Bisbee for a little over 2 months when Christmas came around. Bob, a co-worker of mine was going to go back to Boston to see his girlfriend over the holidays. Bob was a younger guy, about 22, while I was 29. He was fun to work with and we seemed to get along pretty well. He told me about his upcoming trip and told me the biggest pain was going to be driving up early enough Saturday morning to catch his 6 a.m. flight. He knew we had an apartment up there and I asked him if he'd like to go up Friday night and spend the night. It would at least cut off the two hour drive for him. He said that would be great but wanted to make sure it would be ok with Pam. I said I'd call her and ask.
I called Pam and she said it would be fine. There was not even a thought of anything happening beyond him spending the night and getting some sleep.
Friday morning finally came and the supervisor asked me to help him finish a project that was overdue. So much for me making it home that night. I called Pam and told her I would be working very late but I'd be up the next day about noon. She said no problem and she'd see me then. Bob still had some late work to do as well but made it out of there about 6 and headed for Tucson.
About 8:30, Pam called me and asked if it would be ok for her to go out to dinner with Bob, since he'd just arrived. I said sure, no problem and told her I'd see her tomorrow without another thought entering my head. Pam called me about 10 and asked if it was ok is she went out and had a drink with Bob. I laughingly asked if she was going to fool around with him. She just said no way and said goodnight. She would talk to me tomorrow. We worked till about midnight and I went back and crashed so I could get an early start the next morning.
I got to Tucson about 9 in the morning and Pam was still asleep when I got there. It had been a couple weeks since I'd been up there so I took off my clothes and crawled into bed with her. She slowly woke up as I was caressing her breasts and started to kiss her. She responded very passionately to my kisses and touching. She was pretty turned on by the time I started to play with her pussy. She must have been in the mood as wet as she was when I slid my finger inside her.
I made my way down her neck, kissing and licking her breasts, lower and lower. At first she tried to hold me up kissing me and didn't want to let me move lower but I persisted. I love eating her. Pam was moaning and grinding her hips by the time I started tonguing her clit. She was so wet and so turned on that it didn't take her long to cum on my mouth. When I slid my cock inside her, she grabbed my ass and pulled me as deep inside her as she could, rocking up to meet my thrusts. That she was extremely turned on was pretty obvious. Finally, I shot a load deep inside her and afterwards we lie there in each others arms when she acted upset about something.
She said that the night before, when she was out with Bob, they had a few drinks and ended up going dancing. There, they had more to drink and before she knew it, she was plastered. Bob got her home and they were sitting on the couch talking when he leaned over and gently kissed her.
Pam hesitated to see my reaction to this and there wasn't much to see. I was in total disbelief. Finally, I just asked her, "Did you fuck him?"