A childhood belief about history

When I was in year 4, I did a project on the Kings and Queens of England during the Tudor period. I had read that Jane Seymour was the lady-in-waiting and that she was about to marry Henry. My mother told me that lady-in-waiting meant she was the lady waiting to marry the King. My mum honestly seemed to believe this and it seemed perfectly logical to me at the time. Of course, my mother vehemently denies it now.