Lady Capulet likes to control her duaghter more than her father. When he gets her first period she wants to get her married
to a wealthy man as soon as possible so she doesn't have to take care of her anymore.
"Marry, that marry is the very theme I came to talk of. -- Tell me, daughter Juliet, how stands your desposition to be
married?"
She is seeing if Juliet wants to marry Paris or not even though is basicly orders her love him later in the
play.