Twilight star Robert Pattinson was about to propose to girlfriend Kristen Stewart when news of her affair with film director Rupert Sanders broke, a source told Britain’s Daily Mirror.

Pattinson, 26, was so upset that he hastily packed and left the US$6 million (S$7.5 million) Los Angeles mansion he had bought to be their marital home.

The source said: “Robert hoped to marry Kristen and was making preparations to spring a proposal before she admitted cheating. He had bought the house in Los Angeles to be their home and saw them staying there for a long time.

“Now Rob is angry – he’s left the mansion and not spoken to her since. They have exchanged heated text messages only.”

Since the scandal, Stewart has released a statement saying: “I’m deeply sorry for the hurt and embarrassment I’ve caused. This momentary indiscretion has jeopardised the most important thing in my life, the person I love and respect the most, Rob. I love him, I love him, I’m so sorry.”

But Sanders’ brother-in-law, Mr Leopold Ross, rubbished her claim of a “momentary indiscretion”, saying the affair had gone on for months.

Mr Ross told People magazine: “(The affair) was from the last half of filming and all through post-production, clear into last week.”

Jealous

A source said Stewart cheated because she was jealous over Pattinson’s friendship with Australian actress Emilie de Ravin, 30.

Pattinson and de Ravin became close while filming Remember Me in 2009 and as their friendship grew, Stewart became envious and very upset.

“Nothing romantic ever happened between them, but it didn’t make Kristen feel any better about them being so close,” the source said.

Meanwhile, a source has told Radar Online that Pattinson wants to have a man-to-man chat with Sanders.

“Rob wants to have a man-to-man chat with Rupert to find out exactly what happened between him and Kristen. Kristen has already betrayed his trust by cheating, so he can’t be sure that she will tell him exactly what went on between her and Rupert,” the source said.

This article was first published in The New Paper.