We are in our late 50s and fit and healthy and for the most part we are a respectable married couple whose kids have flown the nest. My wife and I enjoy our sex and more recently have been enjoying dirty talk whilst fucking. One of those scenarios has been her enjoying more cock with younger guys. Now talking is one thing but doing it is another and the only chance would be if she had drunk too much and it happened spontaneously. Anyway about 3 years ago my wifes sister came over as she had invited us to a reunion at her old army colleagues mess dinner. it was black tie event and my wife was getting ready with her sister. They had both had a drink and were joking about all of the young soldiers who were toned and virile and would enjoy their company. My wife had black stockings and lacy thong and a semi basque type thing to hold her 36c tits in place. Her sister had a longer dress and black stockings because she showed me enough times. Lots of make up and unusual for wife bright red lipstick. Anyway we arrived at the mess dinner and it was little boisterous to say the least. My wife was being plied with drinks and her sister was encouraging the soldiers by telling them she had no bra on. (she never wears one and has gravity defying tits) After a while they started mingling a bit more and soon enough they disappeared for 5 mins going to the ladies. During that time a younger lady soldier came up and say with me and asked if i was alone and i explained to which she said, your brave! I asked why and she explained that half of them had been in Iraq for 6months and just home inferring that they were horny as hell, jokingly i asked her does that apply and she just laughed. Theladies were now back and more red lip gloss applied and they saw i was chatting to the young soldier so went to dance. After a while i noticed that they were missing and looked around but no sight of them so sat down and explained to Amy (the soldier) and she offered to check out the loo. She came back and said no and asked a few of her fellow soldiers who said that they had gone outside with a group of guys about 20 minutes ago. Amy said she knew they could be only one place and that was in the barracks about 50yards away but and it was a big but, could i handle it if they were up to no good. All sorts of things went through my mind jealousy, fantasy, and what would i feel like if she was with a guy. We wondered over and only lights on the first floor were on so i was escorted up by Amy who suggested she goes first. Within a minute she came out and explained that the 2 ladies were with 5 guys. and my wife was being eaten out by one and had a cock in her mouth. Her sister was sucking on two guys and another was stripping off. My heart was absolutely pumping and she took me into the mess so i could watch her. Watching my wife lying on the bed with her skirt up over her and stockings on show and a guy licking her furiously whilst she was licking and writhing on the bed was such a sight. Her sister was bending over and now had her skirt uo and her tits out whilst she was being fucked from behind whilst giving head to a guy who was face fucking her. All in all they had 3 guys each that night and getting them home and smelling fresh cum was such a turn on