Rashbam on Genesis
היא מוצאת, after she had taken out the pledges given to her by Yehudah and sent them to him via a messenger, she did not want to directly confront him, but said: ”I am pregnant for the man who owned these.”
Sforno on Genesis
היא 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.