A source tells Heat magazine, “They had a meal on Thanksgiving and it was nerve-wracking for Kristen. She felt very uncomfortable and Rob’s sisters couldn’t be completely welcoming. It won’t go back to normal straight away, even if Rob has decided to try again. Rob’s mum wanted him to spend Christmas with them in London and, before their trip to the UK, that had been his and Kristen’s Plan. From London, they were going to fly to Mexico for New Year but that’s all changed now. Rob’s family made it clear that they really want to see him over Christmas and, after the intense promotional tour for Twilight, Rob liked the idea of spending time alone with his family.”