Halachic Basis (2)

Sometimes a quick exchange communicates more effectively, and more personally, than an article. Sometimes, just seeing that others share our questions can make us feel more connected. Our posted questions and answers are an opportunity to learn from each other. Keep in mind that each questioner’s situation may be unique, in ways that affect the halachah. Even the tone of a question can affect the tone of an answer.
My hair is always covered in public and mostly at home as well. My question is that I’m considering joining a week long event abroad and it consists mainly of non Jews. I want to be able to go uncovered for the week, and then resume covering once I’m...
Is there an issue with a husband seeing his wife's uncovered hair during davening or Shema?