It was Christmas Eve and we were at my mother-in-laws place. It was my mother-in-law, me, my wife, her sister and her sister's husband. We were going to stay overnight so everyone was having a few drinks and some of us more than others. My brother-in-law was getting quite drunk and got to a point of passing out so we decided to put him to bed. My sister-in-law asked me to drag him to the room they were going to be staying in which I did. I was holding him up as my SIL began to undress him. My wife and MIL came by to see how we were doing and my SIL had only removed his shirt and socks at this point. My SIL then pulled his pants down leaving in only his pair of boxers. My SIL told me to put him on the bed as she fully removed his pants. Then unexpectedly she pulled of his boxers exposing him to all of us. I was expecting my MIL and wife to leave the room since he was fully exposed and maybe they shouldn't see him this way but they didn't leave or say anything but just stood and watched. My SIL said he woke up early so he didn't get much sleep and said the drinks were probably hitting him more than they usually would. We all left the room and went back out to the livingroom. My MIL wasn't drinking much by my wife and SIL were having a few and I was drinking at the same level my BIL and me were earlier. My wife questioned her sister whether see she should have undressed her husband like that in front of us. Her mother added that maybe she shouldn't have too. Her sister said he sleeps naked and you didn't see him for long. She then added that it's not like we had never seen a naked guy before and asked them if they were ever curious about seeing him naked. Her mother said she had been a little curious and my wife, after a bit of hesitatation, even admitted she was a little bit curious too. Her sister said it is over now and they no longer need to be curious. We got off the topic and just had a few more drinks. My wife was getting tired and said she wanted to go to sleep but said I could stay up later. As there was only one guest room and my BIL was already in it my MIL suggested she sleep in her bed and I could sleep in there when I was ready to go to sleep and she would sleep on the couch. I insisted that I would I sleep on the couch and after some arguing she gave in. I was going to sleep on the couch and she would sleep with in her bed with my wife. My wife went off to sleep and continued to talk with my MIL and SIL. I continued to drink but my MIL and SIL had slowed down thier drinking. I began to fall asleep and they noticed. They suggested I get ready for bed and I agreed. I was rather drunk but still aware of things even though my balance was way off. My SIL came over to help me. She began to undress me starting with my shirt, then my socks and next my pants. I was in just my underwear when I heard my MIL tell my SIL that they better leave them on. My SIL asked her if she was curious about seeing me like she was in seeing her husband. My MIL said she was a little curious and asked her if she was too. My SIL said she was very curious and told her mother if she didn't want to see naked she better leave the room. My MIL told her even though she didn't think she should look she was going to stay and if she was going to do it to just take them off me. She went to pull them down and I tried to stop her but I was too drunk and I was on back with everything exposed. I heard them begin to talk about me and one of them mention I was bigger than my BIL. I fell asleep and the next thing I remember is waking up in the morning with my wife and MIL sitting on the couch opposite me talking. My wife asked if I had a nice sleep and didn't seem concerned I was naked in front of her mother. My SIL came out soon and saw me the same way. My wife asked where her husband was and she said still sleeping. My wife said I was just as naked as her husband last night and to take a look if she wanted. She sat down and I was naked in front of the 3 of them with my wife making no effort to question how I got that way or even have me cover up. When we finally left and were on our way home the only comment she made was that she was glad I got naked. I asked why and she said it was returning the favor of seeing her BIL naked. When I asked her more about it she told he there was nothing more to be said.
I am now hoping that maybe I might get to see my SIL or even my MIL sometime soon.