Twilight star Robert Pattinson is reportedly serious about his relationship with Dylan Penn but friends of the actor are doubtful if it will last, as actor Sean Penn is overprotective of his daughter and is not happy about the affair, according to a report by Hollywood Life.

It is reported that Sean Penn is afraid if Pattinson, who parted ways with Kristen Stewart recently, would dump his daughter Dylan after a while.

"Rob and Dylan are having a thing, and he's into her. But a lot of his friends think it's going to crash and burn because her dad is so overprotective - he doesn't want Dylan dating Rob and Rob knows it. It's very uncomfortable for Rob, because for one thing, he's a fan of Sean's - but more than that, Rob hates confrontation - like, really hates it. He avoids it at all costs, so the fact that Dylan's dad is so anti-Rob may drive him away. Rob is quite put off by it," a source told Hollywood Life. 

The website had recently reported that Kristen Stewart was not left devastated on learning that her ex boyfriend was dating her friend Dylan, and that too not long after he had a short affair with another friend of hers - Riley Keough.

"When Kristen heard Rob had taken Dylan Penn out to listen to some music, she was not happy. She doesn't understand what's going on with Rob and his decision making. There are a million people Rob could date, but he picks someone like Dylan, someone Kristen knows," a friend of Kristen's told Hollywood Life. 

Robert and Kristen's relationship run into trouble last year after the latter made a public apology for cheating on him while they were together. They reunited after a couple of months but parted ways once and for all after months of speculation.

Kristen and director Rupert Sanders had issued separate public apologies after the news of their affair surfaced in July 2012, costing them their respective relationships. Pattinson and Kristen parted ways after their efforts to mend their relationship failed and Liberty Ross filed for divorce on grounds of infidelity.