"Kristen's got a very special night planned for Rob when he gets back. She wants to surprise him by waiting in the backseat of a limo at the airport," contactmusic.com quoted a source as saying.
"It is rare for celeb couples to do that because it doubles the chances of a security issue. So he will be really surprised when he gets in that limo.
"Rob has a huge group of friends who are all dying to take him out, but Kristen's told them to back off until she's had some time alone," added the source.
Pattinson, 26, has already been informed to be ready for romance upon his return.
Stewart has told Pattinson she wants him all to herself in the first 24 hours he is back.
"He will be jet-lagged of course, but she is got a relaxing night planned with a bottle of wine, pizza, and the two of them. That's all they both want."
The couple is said to have really missed each other during their time apart and can't wait to spend some quality time.
"They provide huge comfort to each other and it was hell hitting that Oscar red carpet on crutches without him. That night really brought home how much she needs him in her life," said the source.