The strange woman could be an angel. God can use anything to speak to us. Angels would come to you physically in human form, just to deliver a message. Though not everyone has that privilege of meeting one, you have to be someone who God loves so much. 😮😮😮
It is possible that the husband does not know what is happening and may not know anything about his background. The husband may be innocent all that is happening. However she and her husband need God intervention.
Family background is very important in nigeria. It can be a very big dealbreaker. Anybody that tells you it is not important, never trust that person. Medical test is also very important so that you do not cry later. No security question is stupid to ask before marriage.