To put it in the anatomically correct nomenclature for this discussion, how do you owe your 'ex' dick for an explanation for anything? They are the 'ex' for a reason. Good enough.
I would not even let my ex into one of my shows, even thought I could (with no permission or questions from anyone). I was like 'buy a ticket' - so it goes. She is nothing to me now, just a civilian. If any part of my life was all that important to her, perhaps they should have stayed around.