Simplify the following text for a Grade 7 native English-speaking person.
Original: Shortly afterward , Elizabeth began to be styled Her Majesty Queen Elizabeth The Queen Mother . This style was adopted because the normal style for the widow of a king , `` Queen Elizabeth '' , would have been too similar to the style of her elder daughter , now Queen Elizabeth II .
Simplified: After her husband 's death , she was known as Queen Elizabeth The Queen Mother so that she would not be confused with her daughter , Queen Elizabeth II .