The on-off couple were rumoured to have reconciled their relationship in November last year, following Stewart's cheating scandal, reported Daily Telegraph.
Things reportedly reached crisis for the pair again when it was revealed that Pattinson, 26, had called it quits with Stewart shortly after attending the Golden Globe Awards ceremony in Hollywood this month.
"She's hoping this is just a temporary split," a source said.
The pair were said to have spent the holiday season in London visiting Pattinson's friends and family. But the trip didn't go well.
"Rob's family, especially his sisters, have found it hard to forgive the hurt and humiliation Kristen has caused him," the source added.