We were at a party on the camp site where Katie was dancing and flirting with a couple of guys who were new to the site. Not being a dancer myself I was sitting at a table drinking with a few friends. I watched with interest as the three of them were having fun on floor and dancing sexy to the slower records being played. I think they thought my wife was a single woman as their hands were all over her and both rubbing up against her. They were buying her drinks all night and at one point she must have told them who I was because half way through the night one of them came over and apologized and asked if I was okay to the fact that they were dancing with her and buying her drinks. I assured him there was no problem and that I was actually enjoying watching them have fun. To cut a long story short she was pretty drunk by the end of the night. They came over and apologized for getting her so drunk and offered to help me take her back to our campervan as she could hardly stand up and the van was parked some distance away. I was not that drunk myself but made out I was. On the way back to the van she passed out and we had to carry her the rest of the way. Back in the van we laid her on the bed and I thanked them for helping me get her back. I invited them to stay for a while and gave them both a cold beer from the fridge. After chatting about the party for 15 minutes or so I suddenly said "Oh my god, She'll kill me tomorrow." I lied. "That's a new dress, she only bought it today, cost a lot of money too" Pretending to be more drunk than I was I sat on the bed and tried to lift her head up in an attempt to take her dress off. Not being able to I asked if they could help. One of them pulled her up by her arms so she was in a sit up position. I managed to undo the zip on the back of her dress. I unhooked her bra too. After managing to get her dress off I put it on a hanger as she laid there in just her panties with her loose bra and her breasts partly on show. I said "Oh well might as well get her into bed" I removed her bra and panties leaving her there totally nude for their pleasure. Without making it obvious I slightly opened her legs so her cunt was on show. That was when I gave them another beer and made the excuse that I needed a wee up a tree and left the van leaving them alone with her.. It was pitch black outside and bright in the van. You could not see out of the vans windows but leaving the curtains ajar I had a perfect view of inside.