Does divorce take effect or does expiation become due for one who swore not to go to the house of his wife's sisters if they removed their head covering, then went out of necessity to offer condolences for the death of one of them?

If the wife did not remove her head covering after her brothers requested it, then no divorce occurs, and nothing is binding. However, if she did remove it, the husband has broken his oath by entering the house of her brothers, and his need to console her mother does not make him coerced. If he is doubtful about what he uttered, but he knows that his intention with the prohibition was divorce, then divorce has occurred. But if he does not know his intention with the prohibition, then no divorce occurs due to doubt, but an expiation for breaking an oath becomes obligatory upon him.