Sforno on Genesis 38:25/ספורנו על בראשית ל״ח:כ״ה

1היא מוצאת והיא שלחה, even at this late stage in the trial when she was already on the way to the site of her execution, Tamar did not despair, as she had a heart as stout as that of a lion.

2לאיש אשר אלה לו, even though she was in extreme danger she did not want to publicly embarrass Yehudah. She is the person who inspired our sages to declare that one ought to prefer to be burned in public to publicly embarrassing a fellow human being (Sotah 10