Simplify the following text for a Grade 10 native English-speaking person.
Original: Unfortunately for the Cullen family , Irina , a vampire from the Denali clan , sees Renesmee and mistakenly informs the Volturi that Renesmee is a forbidden immortal child .
Simplified: However , the vampire Irina misidentifies Renesmee as an `` immortal child '' , a child who has been turned into a vampire .