Is a girl sinful for disobeying her husband, to whom she is عقد (contracted) in marriage, in his requests to see her in different images online, knowing that he is traveling?

It is permissible for the husband to see his wife in any state after the marriage contract. She must obey him if she has received her prompt dower and is secure from others seeing her. She sins by not obeying him if she is secure from others seeing her. If she is not secure, she does not sin; rather, it is not permissible for her to obey him, due to the saying of the Prophet, peace and blessings be upon him: "Any woman who takes off her clothes outside her home has torn down the veil between her and Allah the Almighty."