What should I do when we see each other?
My wife outed me to her sister
I am so sorry this happened. Sharing a part of your private life without your permission can be so painful. I might suggest (depending on your relationship) reaching out to your sister and discussing this (or setting boundary that you don't want to discuss your private life). I might also speak with your wife and share how hurt you are and what you need to happen moving forward to begin to heal.