Was dating a hot little 30 year old blond with nice boobs and great ass when I was 44. She warned me when we started seeing each other that I would fall in love with her pussy and she was not wrong. She had been separated from her hubby for about 8 months so I thought they would probably stay apart. We fucked like rabbits. A quickie for us was 45 minutes or more, often much more. One night I went to her house unexpected and we immediately headed to bed. I was horny all the time and as we lay naked and making out, I started kissing my way down. She resisted but while sucking her rather large nipples and a finger burred in her wet pussy her resistance gave way fast. Finally she said, "Fuck it, go for it" and I did. With her sitting on my face and her facing my feet, as my lips and tongue made contact, I was immediately welcomed by a very wet, juicy pussy. She was going wild thinking I would never put 2 and 2 together to realize I was eating her juices and another mans cum. As she leaned forward during a huge orgasm, I was rewarded with what felt like a spoonful of mixed seaman and her juices on my tongue. Holding some in my mouth I moved to lay next to her and while kissing, pushed some of the combined juices in her mouth. She seemed startled but then gave a wicked little smile as if to say "you don't know it but you are eating my ex's cum". What she didn't know was that I loved it.
Found out a little later her ex had come by for servicing. Seems they had a deal whereby her support compensation could be increased with proper care and servicing of his sexual needs.