She sent... — The Talmud praises Tamar for so acting, as to bring no public disgrace upon Judah; and he acknowledges that he was most to blame, because the cause of her crime was his own failure to act justly by her.
Related Commentaries of Genesis 38:25
Genesis 38:25-26
25 When she was brought forth, she sent to her father in law, saying, By the man, whose these are, am I with child: and she said, Discern, I pray thee, whose are these, the signet, and bracelets, and staff.
26 And Judah acknowledged them, and said, She hath been more righteous than I; because that I gave her not to Shelah my son. And he knew her again no more.