I asked W while making coffee this morning when she was returning. W said Sunday. Against best DB standards I remarked, "Do you have a friend up there?" Not in a condemning way, but more off the cuff. Well, W gets immediately mad.
Maybe it was the way you asked rather than what you asked. It was a very passive/aggressive comment. Perhaps you should apologize to her and say "I hope you understand that I still struggle with trust after what happened, and I can't keep my mind from wandering. Perhaps you can tell me what you are doing and who with to help me understand there is nothing to be concerned about. I appreciate you being patient with me on these things."