But are you serious about this shirt thing? Come on, you be the bigger woman, the classy one. Gloating in her face may make you feel better for a sec, but do you really think that it will help matters?
As we love to say, will it get you any closer to your goal?
The answer of course is "no." Leave it be.
It is not your job to punish her, it sounds like she is self-punishing anyway, and you do not want to push her over the edge into a breakdown, or give her a reason to fight harder for H or make your lives any more miserable.