No, “ trash the dress” is not a photo session after the divorce. You will hopefully not even damage your beautiful dress, it may need a clean after though.
You have married the man of your dreams for life - right? Therefore, you won’t need or wear your expensive special dress again. No, your daughter or daughter-in-law won’t want to wear it. You could sell it on eBay or ….... call me and we will arrange a photo shoot around non-wedding places. This will be a fashion-style shoot on a day to suit. You can bring your new, old man with you if you want, wearing your choice of attire. I am currently looking for recent brides who would like to try this service completely free of charge ... well you can buy me lunch if you insist.