As said in my comment once married the walaya or wilaya (the guardianship) passes to the husband. The father or former wali is only significant in absence of the husband as a person of "trust"!
This is based on verses such as:
...They both found her lord (i.e. her husband) at the door. ...- Translation of Muhsin khan(12:25)
which means that the husband is ruling his household and therefore has the guardianship!
In addition to verses such as (4:34) and (66:6) and the hadith:
"All of you are guardians and responsible for your charges: the Ruler (i.e. Imam) is a guardian and responsible for his subjects; and a man is a guardian of his family and is responsible for his charges; and a lady is a guardian in the house of her husband and is responsible for her charge; and a servant is a guardian of the property of his master and is responsible for his charge." I think he also said, "And a man is a guardian of the property of his father."
(Sahih al-Bukhari, Sahih Muslim, Sunan abi Dawod, Jami' at-Tirmidhi)