The wife that is pretty to her husband may not necessarily be a standard beauty on the magazine covers.
However, the husband sees her beautiful neshamah, which colors his perception of his wife. Thus, to him, she is beautiful.
Hopefully to Hashem we are also beautiful, for Hashem sees our souls and the good in us. According to Torah, the Jewish people are like Hashem’s wife.
A wife also needs to be attracted to her husband, see his good, and the beauty of his neshamah. He also may not be attractive by modern or most people’s standards, but to her his is handsome.
Furthermore, a husband is not meant to look at other women after he wants his date to be his kallah, and ishto. Then she is the most beautiful for there is no other woman in his world, b’esrat Hashem.