We were invited to a party at my wife's workmate's house and she accepted without delay, not recalling I had an appointment with a new business partner who was coming across from Ireland specifically to meet me. I assured her that I would get to the party just as quickly as I could but knew it would be late and i would probably be just needed as a late night taxi. on the day of the party i was busy preparing for what was essential work to showcase my business in the best way. Liz had been busy doing some special shopping and i lusted after her as she displayed her body covered in a sexy short skirt which displayed her shapely legs to four inches or so above the knee. covered in black stockings they looked delectable. Her favourite low cut top had been replaced by a tight waistcoat type which showed her breasts wonderfully. I said she would look fabulous and any spare guys would be certain to be sniffing around. Her reply was that I could have the cream if it were not for the meeting and maybe someone else would be licking at her honeypot if she liked them. I noticed a mischievous tone to her statement, sensing this was a bit of fishing for her to play. My grin gave it away as she knew I loved her being naughty because i knew she would be telling me all about it when we cuddled up in bed. A quick kiss and my consent or desire more like was whispered into her ear and she cuddled me and said 'No promises but it might well happen, I am in a sexy mood' I knew that was like a certainty she would be on the prowl for fresh cock. My meeting went well and I hoped to get away until my new partner announced he had booked a table as celebration. I could hardly say no so sent a text to my cougar, who at fifty still had a well looked after body giving her a lovely size twelve body for her 5' 5" frame and 34E breasts. The return message said she was fine and being entertained by a fit fellah around ten years her junior and he had been exploring. Now I was in turmoil and almost told my new partner I was going home, but it was a bit rude and unfair to leave the guy in a strange town and disappear, so I did the next best thing and told her maybe she could take him home and if I could I would use my SAS techniques to sneak into our house and maybe watch a bit of fun. (I have never been a member of the forces but can creep around furtively when Liz is having sex with somebody else). My reply had me shaking inside as she confirmed he was wanting her and she was thinking they might disappear in an hour or so and that the back door would be left off the latch. I drifted through the meal and our conversation had me asking him to repeat his statements as I was failing miserably to comprehend his chat, not aided by his soft Irish accent. We ate and drank and finished the meal around an hour later, I had several texts waiting for me, which I could not dare to read in case I said something to let the cat out of the bag as it were. Paddy eventually said he was knackered and had booked a room in the hotel for the night. I offered to pay for it but he smiled and shook my hand and said I should get home to my wife and that he wanted to meet her next time he was over, in a month or so. nice chap and I did feel guilty for seemingly being so distant. Shaking hands again and agreeing to meet again next morning so I could get him to the airport for the short flight back home. I was into my car and pulled away to the end of the road then remembered my texts. Four of them, the first saying she was in luck and they were waiting for the taxi, a picture accompanied it with her thong lying at the top of the open handbag. My cock struck firmly against my pants, stiffening uncomfortably until I adjusted it. The second pic was of a hand up her skirt and a message, in the taxi and a small devil icon. So it was definitely game on. The third message was a selfie of Liz in our bathroom naked, with the message, 'Be quiet when you get in' The last message blew me away, timed twenty minutes later. In the bathroom with her face splashed with what had to be spunk. The last message said, 'The next lot is going up me, but it tastes lovely and eight lovely fat inches all for me, bedroom door slightly open and lights off. I was almost uncontrollably excited but faced a fifteen minute drive with a virtually exploding cock and a mind overwhelmed by sexual imagery, I could hardly wait to see the real thing happening in my house, in my bedroom with my sexy wife. I know I had seen it all before but each meeting has a special feeling of wonder and excitement. I parked in our drive at the side of the house thankful my car had a quiet engine. I quietly emerged and closed the door, not locking it because the noise of the locking mechanism and the annoying bleep of alarm setting itself would surely rouse suspicions. Getting to the back door I entered easily then stood to get my eyes used to the darkness in the kitchen. I opened the fridge and got a bottle of water, suddenly dry in the throat and beside myself at what was going on a few feet above me. i could hear her giggling and gasping, she was obviously in full fun mode. Shoes off and through the door to the hallway and staircase I stopped at the foot of the stairs and took two deep breaths then ascended. It seemed to take an age and I sensed creaks as though they were amplified a hundred times. It seemed an age but I made the top of the stairs and heard the rhythmic movement of our bed as he was obviously fucking her long and slow and getting the right responses from Liz. I got to the door and peered through the crack to see two bodies in the throes of full bareback sex. He was thrusting faster and she was urging him ever deeper. I only saw the last minute or so of their sexual union but it was wonderful. I noticed her clothes were all across the floor next to his. They collapsed and then slept. i waited around then disappeared into the spare bedroom where Liz had scribbled a note. 'No snoring'