It is always the term given to parents who don't have a job. Well, lets be honest, MOTHERS who don't work. (Men don't get these labels do they? In fact the very idea that a man wouldn't work because he has children rarely seems to crop up anyway!).
But my point is, I saw Carole Smillie on the front on a magazine saying "Why I could never be a full-time mum" which I inferred as "Why I could never give up work" or something similar. I would hope even if she worked on the Moon 24 hours a day, 7 days a week, she would still be a "full time mum". In fact I wish she would go to the Moon and take Carol Vorderman (another woman who wishes she didn't work - believe it or not - and once said she wishes she could stay home and be a "proper" mother!!) with her. You are still someone's mother whever you are. Why do people think being a mother means one thing and being a dad means doing something else?
Sorry I just had to rant!