This happened about 10 years back when I was working a project remotely. Yes, I'm married (well at the time) and no she wasn't with me nor did she know, condone or like the idea (but that's a different story). Because it was such a long project, I had an apartment near the project site, so I didn't have to carry everything back and forth from my home to the site every week. It was a four hour drive done every Monday and Friday to support the project (and getting away from the ex of the time). Because I had this place and because I had discovered how much I like bi sex (another other story), I would look into the Craigslist personals for fun looking hookup opportunities. I mostly looked for couples seeking a man, becuase that was a seriously welcome diversion for me (bi or not)...
This particular ad really caught my interest. It was a married couple that were looking for someone to watch them have sex. No touching or interaction implied. We connected via texts and discussed and finally came to a mutual agreement to meet. I invited them to the apartment and they agreed to show up and see how it went. After some fumbling with the security gate (gated apartments, great for somethings... not great for others), they managed to get to my door. What a nice couple they were. They were in their late 30's (I was 44 at the time). He was maybe 5'10 160... she was probably 5'7 and had a nice body. Nothing cartoonish... maybe 36 C and a very nice ass (as best as could be seen in those nice blue jeans). Welcomed them in and offered them a drink... like me, they liked wine (we had chatted), so I had a bottle of pinot noir readily available. We had a glass apiece and chatted for maybe 10 minutes, when finally she said "let's get this started... we didn't come just to chat"... her courage was up, so we went around the corner to the bedroom.
They suggested I sit on the corner of the bed and then she loosened his belt and pulled out his cock.. wham bam thank you ma'am... just like that and started to lick his 6" cock. It ceratinly looked very nice and I was enjoying the show. Shortly after, she pulled off his pants and he started to pull hers off. They suggested I get more comfortable and I removed my pants as well. He pulled her pants completely off and she had a lovely pair of cotton panties, nothing frilly, but almost cute on - they didn't last long as he pulled them off and within a few seconds started to slide his cock into her fully shaven and glistening pussy. WOW... I had never watched a couple that close just having sex right in front of me. Sure I'd watched porn, heck I'd been in a 3 some before, but this was different. My own sex show! And it was amazing!
They went on for quite some time and were definitely having a great time! I enjoyed it thoroughly! Eventually, he pulled out of her and told her that she should thank the host :) Well that was a pleasant surprise. She had me lay down on the bed and started to give me a very thoughtful blowjob... but didn't let me cum... not just yet. She graciously allowed me to taste of her delightful pussy which I thoroughly enjoyed. After pleasuring each other for twenty minutes or more, she pulled me to the edge of the bed and took me back into her mouth... but asked me to tell her when I was going to cum... so I did. She pulled me out and had me cover her gorgeous breasts with my cum. Quite the load she drained from me and I was delighted to provide what she wanted :)... What I didn't know was that her husband was going to then come over and lick my load off of those gorgeous tits!!!! WOW... pleasant surprise, but that was the end of our first encounter. They cleaned up, thanked me and went back to their home...