Later, when my anger settled, I regretted discarding the photo of x so I retrieved it, but I couldn't really restore it. It is streaked and ruined.
I know this was a photo that my daughter liked, so it was bothering me. So yesterday I called my x and asked her to get a portrait done and framed to send to our home. I insisted that she send me the bill and that I would pay. X thought this was a great idea, but she didn't see why I should pay. (What a reversal of the usual argument!) Finally I admitted what I did and why I wanted to pay.
She didn't seem to be mad about me defacing the picture, but she did agree that it was a valid reason for me to foot the bill for the portrait. The only question left is how to explain this to my daughter.