To what degree/extent the woman obeys her husband?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

A wife should listen to her husband in every matter; i.e., his orders and prohibitions, as long as he does not order her to do what is forbidden or prohibit her from doing what is permissible.

Also, if fulfilling his orders is beyond her capacity or causes any harm to her, then she should not follow them.

Allah knows best.