Kristen Stewart flirts with Arnold Schwarzenegger's son Patrick
Kristen Stewart is trying to make her boyfriend Robert Pattinson jealous
Patrick Swarzenegger is only 19
Kirsten Stewart and Robert Pattinson fell in love on Twilight
Kristen and Taylor - who played vampire Bella Swan and werewolf Jacob Black in the film saga - are close pals.
Robert is currently in Australia shooting new movie The Rover.
SEE PICTURES Robert Pattinson and Kristen Stewart - a love story in photos
Read more about Kristen Stewart in Now magazine dated 18 March 2013 - out now!