24 And it came to pass about three months after, that it was told Judah, saying, Tamar thy daughter in law hath played the harlot; and also, behold, she is with child by whoredom. And Judah said, Bring her forth, and let her be burnt. 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.
The hypocrisy in Judah is incredible. Three months prior he crept into the tent of a prostitute, but when he hears that his daughter-in-law has herself been a prostitute, he demands that she be burned! Not only is Judah hypocritical in this matter, but also in how he has done nothing but shirk his responsibilities to his daughter-in-law for years, yet once he believes her to be in infraction of her contract also, he immediately seeks justice against her!
Then, at last, the moment of revelation comes. Tamar has shrewdly held onto the signet, bracelets, and staff that she was given by Judah. They are clear markers of his identity and there is no question that she was the prostitute he met along the road, and he is the man who is the father of her child.
I do not know whether levirate law permitted for a widow to be given to his father, but it is worth noting that rather than go to some stranger Tamar had kept the whole affair within the family, and she only did what she did after Judah was a widower, with no other lawful wife. It may still be a shocking course of action, but Tamar deliberately chose to operate within the very limited restrictions that she had, rather than totally abandon her commitments.
All these matters turn Judah’s anger in an instant. He has been found out in front of others, and at last he admits his own unrighteousness. He has lived an unholy and lustful life, which has borne him a most awkward fruit, and at last he owns that shame. “She hath been more righteous than I.”