Kristen Stewart is reportedly "very nervous" about Robert Pattinson's upcoming interview on The Daily Show with Jon Stewart

The couple has gone their separate ways after the revelation the Twilight starlet had an affair with her Snow White and the Huntsman director Rupert Sanders.

And RadarOnline claims that Robert's first interview since the scandal broke is filling her with dread about what he might say or how the acid tongue host might tease the actor about the situation.

"Kristin is very, very nervous about Robert's interview with Jon Stewart on Monday," a source told the site.

"She's confident that Robert, who has always been such a private person about his personal life, will keep quiet over the cheating scandal.

"But she does have some concerns that Stewart might poke fun at the situation in an attempt to get Robert to open up.

"While she has a sense of humour, this isn't something she wants joked about. Kristen is hurting and doesn't want her heartbreak poked fun at on TV.

"She's crossing her fingers that Jon doesn't go there and instead concentrates on promoting Robert's new movie Cosmopolis."