It looks like things are heating up between Robert Pattinson and Dylan Penn, so much so that his ex-girlfriend, Kristen Stewart is having a melt down and her father Sean Penn is threatening his daughter's new boyfriend.

According to Entertainment Wise, a source told Ok! Magazine that "She's traumatized by it," referring to Pattinson constantly making headlines with new flings.

There are several romance rumors surrounding Setwarts ex-boyfriend and it seems the "On the Road" star cannot take.

And insider allegedly said, "Every time she reads about him with a new girl, she goes into meltdown mode. But reading his new interview, where he's definitely on the hunt for love, has tipped her over the edge."

Another person who is uneasy about the relationship is Dylan's father Hollywood playboy Sean Penn. According to Hollywood Life the actor sat down with Robert Pattinson to talk to him about dating his daughter.

Penn is worried that his little girl is just a rebound for the hot British actor and wants to make sure Dylan doesn't get hurt.

A source said, "Rob and Dylan get on well and really fancy one another. It's obvious Dylan is smitten."

Further adding, "But Sean had a chat with Rob recently. Sean knows what it's like to be a young, successful actor and the beautiful women that come with it."

The insider revealed, "Sean gave his piece about not getting too heavy with his daughter if he's playing the field, as he doesn't want to see her hurt."

Just last week the couple was spotted getting cozy at The Viper Room, and then again during a night out at the Chateau Marmont on September 25th.

An eyewitness said, "He was very affectionate with her and they seemed comfortable."

What are your thoughts of Robert Pattinson dating Dylan Penn following his split from Kristen Stewart? Leave us a comment of your thoughts below.