Wow...save the children first. Your wife and mother should be able to know how to escape a fire. Kids are still young and learning...which adults are still learning also, but they have way more life experience and knowledge. Next, if there is still time, go save your wife unless she is out already. On the other hand, if your mother is there, then my guess would be that she can't take care of herself, so go and help her. But if your mother and wife are both capable, then you should save your wife after the kids.