I believe we're everyone in our dreams (since they're ours) kind of like having DID I guess :-) so some part of you doesn't sound it's happy with something you did recently?

If it were my dream, I'd look through thoughts and actions I had yesterday and maybe the day before and see if there wasn't somewhere where I said to myself, "you're gonna get it for that!" or even a book/novel you were reading, TV show/movie you were watching where you thought that about a character.

Too, I'd look and see if the "opposite" were true and see if there weren't some situation that was "similar" to that triangle where I suspected the other person of thinking something like that because of the situation, even though "I didn't do it!" Kind of an I thought she would think that I thought. . . scenario where I tend to overidentify with what I think other people "should" think or feel and don't check it out. When that happens I think others are out to "get" me even though that might not be the case but only in my head. So, my head would put it in a dream so I can "see" it better, in 3D and maybe get the connection.

It's sort of how I think therapy worked best for me; when I could get my head, myself and my therapist all working on something together (or journaling); it gets easier to see if you can somehow put a problem "out there" by using "3" people.