This is not those cursed Charayyydim. This is the Talmud!
G-d specifically wanted King David and Moshiach (Who will both conquer the world) to come out of Tamar, because she was very modest in her father in law's house (Rashi, Makos, end of 23). She covered her face with a veil, and Yehuda did not even know what she looked like. (Click Mar 14, may 30)