"Selfishly, I'm really pleased with my relationship with this kid," the actress, 22, tells PEOPLE while attending a Cirque du Tacori event in Santa Monica, "but I really like the way it affects my relationship with Jacob."
Reed's character, Rosalie Hale, has always had a sizable chip on her shoulder when it comes to Taylor Lautner's shape-shifter, but after reading through the new scripts, Reed is looking forward to exploring her vampire's softer side.
"In the first part of the books Jacob and I hate each other," she says, "but we bond over this baby and we develop this connection that is really powerful."
It's a connection that Reed says is reminiscent of her off-screen friendship with costar Lautner, 18.
"It feels similar but at the same time more volatile than the relationship that I have in real life with Taylor," she says. "We're obviously buddies, but there's a playfulness that we get to explore that wasn't there before."