My wife too...
My wife was for a couple of years my best friends "goto" girl for him to empty himself. We all knew it, cos sometimes he just dropped by our house for a quick fuck and then just left a couple of minutes after he had given my wife a hot load of semen, but my wife liked it, I liked it and my best friend sure as hell liked it, so we just let him do it until he got married some years ago. And in rare occasions later too, and I sometimes miss those casual fucks where my wife was just my best friends casual cumdump.....
I love that sort of situation. It was very similar for me when Jess was fucking her cousins husband and also the guy next door. In this thread, most of my memories have been focussed on my two buddies secretly fucking Jess every weekend, however I enjoyed the time that she was fucking Mark.
Mark was married to Jess's cousin so he was family, and because he was family, he was able to call by my house anytime without raising suspicion. Their affair was initiated when Jess called by her cousins house one day. her cousin, Alice, was out unfortunately, or maybe I should say fortunately, because Jess and Mark sat talking for quite a while before he eventually hit on her. I know that Jess has always liked Mark, after all he is a good looking guy, so, when he did hit on her she wasn't going to turn him down.
Nothing happened that day but Jess suggested to him that he could call by our house on a day that I was working. Marks employment allowed him free time during weekdays, so, with their arrangement in place, Mark was popping round to our house regularly to fuck Jess in our bed. As I said already, he was family, so as far as we know, he didn't raise any suspicion when he called in. He was fucking Jess for months. Unlike your situation, Mark didn't know that Jess had my blessing and told me everything. He thought that I was unaware of their trysts.
It was the same situation when Jess was fucking Dave, our next door neighbour. He worked on the same complex as me, except we were on different plants and on a different shift pattern, so we never came into contact at work. Because Dave's wife worked days in a bakery, Dave was onto a good thing. There was an eight hour period almost every day, be it morning or afternoon when he was at home and I was at work. He had ample opportunity so slip into our house via the back door. He was fucking Jess as often as he could, sometimes as much as four times a week. I have happy memories of them thanks to jess's openness. Because Dave's wife started work in the bakery very early in the morning, there were occasions when I was on the 6.00am shift that he was in my home by 6.30am. There were many occasions when, because both of them had just got out of bed, they went into the shower together before climbing into our bed. The thought of them in the shower together soaping each other down was so erotic, it really got my juices flowing, even more so when Jess revealed that they sometimes fucked in the shower.