What is the ruling on removing the niqab at the husband's request? Is it permissible to wear a jacket over the abaya in the cold? What is the ruling on a woman driving a car and working alone in a shop?

A woman is required to cover her entire body, including her face, from non-mahram men, even in non-Muslim societies. She must adhere to this in obedience to her Lord.

There is no harm in wearing a jacket on cold days, provided that it is worn under the khimar or is loose enough not to reveal the size of the shoulders or the shape of the body.

It is permissible for a woman to work alone in a commercial establishment, provided she ensures her safety, avoids khalwa (private seclusion) with non-mahram men, and limits her speech to what is necessary.