Intelligence Failure

That goof that I had with T. and my relation to her turned out to be worse. All along I only knew that my wife calls her father a 叔叔 (shu shu in pinyin, for those of you whose web browser or OS cannot handle Unicode Chinese). I knew that he and my father-in-law are not blood brothers, so I assumed that they are cousins. Today, I found out from my wife's second older sister that T.'s father is really my father-in-law's uncle! So technically I'm a nephew to T. We chatted not too long ago and I told her that and she gladly noted that it doesn't matter. I suppose she would not want to be known as a grandaunt to my son.