Zero Asked: dreams in the start of the book?

yeah like i'm making a comic book but i'm writing it out first, and it starts out with a dream for the main character but it hints at what she's going to face later on (so basically a kind of psychic dream). but my sister once told me something about me not doing that or else i'll make the readers feel like i mislead them (something like that, it was a while back) so should i or shouldn't i?