Kristen Stewart marks 23rd birthday with Robert Pattinson

LOS ANGELES — Kristen Stewart, who celebrated her 23rd birthday this week, was spotted reveling with on-again-off-again boyfriend Robert Pattinson.

The “Twilight” twosome were seen Tuesday having dinner for Stewart’s big day at Malo, a Mexican restaurant in Los Angeles, with about 40 friends, including “Spring Breakers” star Ashley Benson, X17 reported. After dinner, the couple stopped by No Vacancy at Hotel Jupiter, where Hanson was having its album release party, E! News said.

“They weren’t overly affectionate or anything, but at points they were standing together as they talked to friends,” a source told E! News. Perez Hilton, however, reported that the couple are “%100 BACK ON.”

That would seem like an ordinary birthday, but one British tabloid decided to give readers something more to sink their teeth into, reporting Thursday that she received a lavish birthday gift from RPattz: a pen.

But not just any pen. It’s supposedly a limited-edition fountain pen with a barrel identical to the dashboard in the earliest Bentley automobile and one of only 40 in the world, according to the U.K.’s Daily Star. Its estimated price was 30,000 British pounds, which converts to roughly $46,000.

“Rob decided to go big for her birthday this year,” a source said.