WASINGTON:Robert Pattinson’s aunt has asked the Brit heartthrob not to fall for his Twilight co-star Kristen Stewart, for it would be difficult for them to have a peaceful life as a couple because both of them are big stars in their own right. According to reports, Stewart has split from longtime boyfriend Michael Angarano, and is being linked to her on-screen love interest Pattinson. Both Pattinson and Stewart, who are now working together again for the sequel New Moon, and they have claimed they are just close friends and co-stars. “I don’t think it would be a good idea for Robert to be in a serious relationship with Kristen. How can he live his life with a fellow star, with their every move being watched just like Tom Cruise and Katie Holmes?” Contactmusic quoted her as saying.