Robert Pattinson's sister has urged him not to reunite with Kristen Stewart.
The young actor spent Christmas in London and was warned by sister Lizzy not to take his cheating co-star back.
Kristen cheated on Robert back in July with Snow White and the Huntsman director Rupert Sanders.
According to a source, via The Sun, rows kicked off in the Pattinson household on Christmas Eve when Rob's protective big sis had some words with him 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."
Apparently one of the reasons the Twilight couple spent the festive season apart was because Kristen is terrified of facing Rob's family.
It was previously reported that Pattinson had set a deadline of Valentine's Day next year to make his final decision on whether to continue the relationship with Stewart.
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