Kristen Stewart: Back in the Big Apple

She’s gotta have a massive frequent flyer balance, and last night (March 15) Kristen Stewart was spotted arriving in New York City via JFK International Airport.

The “New Moon” babe looked to be in good spirits and even cracked a smile when one of the paparazzi following her took a spill.

And while Kristen and her “Twilight” costar Robert Pattinson seem to be the perfect couple, a source told press Rob isn’t interested in getting tied down to one relationship.

"Kristen wants get married and have kids, but Rob's not ready. He gets stressed out whenever she starts talking commitment and it causes some nasty rows. Some people think Rob's still set on playing the field."

"Rob's so immature. He thinks that as this big movie star he can do whatever he wants, but he should realize that Kristen deserves better. Some of us wonder if he's serious about her at all. He seems intent on keeping his options open. If he doesn't grow up I don't think the relationship has any future for Kristen."

Enjoy the pictures of Kristen Stewart arriving at JFK Airport (March 15).