This happened about two months ago when my wife and I had a week in the sun, our first for years. We met a great couple about the same age as us (late 40's) and had a good time. We kept seeing each other as they had the hotel room next door. I suppose I fancied the wife, and my wife laughed a lot at his jokes. On the last night, we all had a good meal and plenty to drink, my wife certainly having more than she's used to. Looking back on it, we had already swapped partners on the long walk back to the hotel. My wife and the guy were a long way behind but I could hear her laugh, so I didn't worry. Back at the hotel corridor, my wife was fumbling for the room key and saying 'I don't know if I'm at the right door, or with the right man'. With that the wife helped her get the door open and pushed them both inside. She dragged me off into their room. 'You know he's going to fuck her don't you?' she said. 'I don't think she'll go that far, but it's good to see her enjoying herself again' I said. She poured a couple of drinks and started to snog me. I could hear my wife next door, laughing. 'When you went to the loo, they were all over each other, and he put his hand up her skirt, and she just opened her legs more' she said. The laughter next door had stopped, and we couldn't hear anything. 'She's probably passed out!' I said. Then we heard the the rhythmic thuds of a couple shagging! Soon followed by my wife having the loudest orgasm I've ever heard. 'Believe me now?' the wife said. 'Come on, your turn' and she laid back, grabbing my erect cock. I just climbed on top and fucked as hard as I could, not lasting long. I was so turned on by hearing my wife. Me and the guy both returned to our rooms. The cheeky git said 'Thanks mate'. My wife was really happy and satisfied. I shagged her in the morning.