Oh hun, what a great thread! I had such a laugh when I read your post. My mum is not much different to yours, she often diagnoses me with things she just makes up and later blames them on why we're not getting pg. Don't you just love 'em?? Mothers...
I think sometimes they a) want the best for us but it just comes across pushy and over the top and b) they want to live their lives through us .