We have one of those 10 person tents and on occasion a group of us will go roughing it in Kentucky where we know someone with 5k acres of wilderness, much of it is part of the conservation. Which is where I'm at now. There are 5 of us and I'm the only guy this time, so since I didn't have any fishing buddies, I didn't bring my gear so I guess the intent was mostly hiking or just to have something to do this weekend. I've known everyone in our group for a while. It's my g/f's sister, their niece (brothers daughter) and her niece's friend. Normally our group is 9 people which would include my regular fishing buddies. God I wished they had been able to come this time and none of this would have happened. We had a "normal" time yesterday, kinda boring but ya know. Once it got dark enough, we retire, not laying in any particular order since we have plenty of space, other than my g/f who is sleeping to my left. At some point in the night or early this morning, I'm awakened to a pleasurable oral sensation and naturally assumed it was her. Not exactly an appropriate time and place considering we're with guests but everyone else I presumed to be sleeping, so I go with it. It's not that unusual for her to wake me up like that. The night sounds are pretty loud anyway so they drown out any noises and I couldn't even see my hand in front of my face. Even feeling the back of her head, I didn't notice any difference because mentally I assumed this was her. Maybe if I was a little more observant, I would have noticed something physically different. It wasn't until afterwards when I feel this person, who I thought was my g/f move away from me and uses their hands on my legs to crawl backwards out from under the sheet I had laying over me as apposed to just rolling over next to me like she would normally do. Then I hear this person cough and clear their throat at a distance that was not directly next to me. That's when I got confused, so I reached my arm over to my left and feel my g/f laying there and she had not moved. So then I'm freaking out and trying to process what just happened. I felt so damn stupid and generally just confused. I didn't sleep at all from then on and got up suspiciously observing everyone once daybreak hit. But everyone is acting normal and I can't figure it out but I felt like I was going insane because it makes no sense. We're now back at the cabin where I have some signal and it's nearly 4pm yet still have no clue who it was. I don't even know WTF to do but earlier my g/f bought me a carmel apple turnover as a surprise and I don't know why but I almost broke down. I gave her a hug and told her I loved her. I felt horrible and sad at the same time. The biggest issue creeping me out is the age discrepancies here. Two of these girls, I'm old enough to be their father so it's constantly rolling in my head because I just can't imagine her sister being like that plus she's happily married. From what I've gathered from her husband's jokes is that she doesn't even like giving oral. The other two, I dunno but having a hard time leaning on any one person over the other. None of them ever came off to me, to be like this, that is to say, sexually aggressive or anything of the sort. I don't want to cause any relationship issues between anyone but WTF??? Mentally I feel ashamed but the question I have is like why would one of them do this? Or did they think I knew who it was and that I wanted this? I've thought hard all day on if I could have accidentally led anyone of them on but there is no way I did. I've been my normal, laid back, keep to myself, self all week. The most I could think of at the moment was to ask my g/f if she had woken up at all during the night, maybe I was somehow mistaken on the feeling and sounds of distance but she said she never woke up. Should I just tell her and let her sort this issue out? None of them are giving me any particular vibes or social indication that something unusual is going on. I feel stupid for posting this because I feel like if I was a female that any discourse on this subject would be taken way differently. I feel like this person stole something from me and is now riding their kite for getting away with it. I just want to have a talk with them to understand why, hopefully come to some sort of closure without making a family scene out of it but I can't just go around and ask about such a thing. Would they even confess if I did? What reason is there? I makes no sense...sorry I'm rambling and am confused.