British tabloid The Mirror reports that Pattinson and Stewart are not back together and that he's been staying in her home because he doesn't have one of his own.
"Rob doesn't have his own place in LA. When he's in town, he sometimes stays at the Chateau Marmont and very often at Kristen's when she's out of town," an insider told Hollywood Life. "This gives him the chance to hang out with Bear and Bernie."
The source went on to say that while there isn't anything "romantic" going on with the former Twilight co-stars, the two "are still really close and would do anything for each other."
Reports that Pattinson has been staying at Stewart's home come days after he revealed that his parents had moved into his Los Angeles house.
"My parents borrowed my house, which I was borrowing off someone else and then they kicked me out of it when I came back from Toronto," he said. "So that's the end of that, so I'm now homeless again."