Robert Pattinson and Kristen Stewart
Robsten on the Red CarpetReuters

Robert Pattinson maybe back with Kristen Stewart but he got scolding from his protective sister for taking back the girl who cheated on him.

Pattinson is currently in south-west London, spending festive holiday with family and friends. He has left his girlfriend Kristen in Los Angeles.

Lizzy, sister of Pattinson, nipped the Twilight actor for taking back a cheat, reported The Sun.

"The rows kicked off on Christmas Eve when protective Lizzy had some words with Robert about getting back with a cheat. They were out drinking in Barnes, where Rob grew up. Lizzy was giving him grief about taking Kristen back and said she's always hated the way he's been treated by her. He and Kristen spent the festive season apart partly because she's terrified of facing Rob's family," The Sun quoted a source as saying.

Twilight co-stars Robert Pattinson and Kristen Stewart are back together after a brief separation following the latter's affair with her "Snow White and the Huntsman" director Rupert Sanders. Pattinson even left the Los Angeles home they share because of the issue.

The couple reunited during the premier of their last Twilight series, "Breaking Dawn Part 2" and Pattinson's mom Clare had reportedly forgiven her.

"Kristen and Rob's mom hugged when they saw each other at the after-party. They looked really happy to see each other and spent quite a bit of time talking and laughing. Bill Condon and Rob were also there, but they were talking to each other, and Kristen and Rob's mom were talking to each other," had earlier quoted a source as saying.

"Kristen and Rob's mom looked like they have a great relationship. I didn't see any tension between them whatsoever!" added the source.