You may find yourself presented with the perfect opportunity to wreak unsuspecting revenge on your ex, fuelled by their despicable behaviour in recent times.
You might seriously court the possibility of doing so and be highly tempted to actually do something, especially if the circumstances indicate they’ll never find out it was you.
Believe me, this is tantamount to drinking poison and expecting the other person to die.
Ponder the possibility of what might have happened over a nice calming cup of tea, then let it go.
Alternatively, instead of fantasising about how your ex will get their just desserts, try focussing on how you can punish them by living a long and happy life without them.