In your dream, all these women represent different aspects of your concious thinking. Your mom and grandmother are 'above' you in relation, and Mrs. Obama is the wife of the president...also a 'higher' office. Marriage signifies a commitment between thought and action. (Action would be represented by a member of the opposite sex.) For the president's wife to say that you need to be married, this shows that you need to quit thinking so much and start doing. Not just doing, but you need to make a commitment between the idea that you have, and taking the steps necessary to get it done. With all three of the other women being of importance, I'd say that you have been thinking of some lofty, high minded, important things. I can see where thinking of something so big can cause you to hesitate to move....but if you don't move, you can't make this idea happen. Hope this helps in some way. God bless.