And you thought your in-laws were scary. 

Robert Pattinson reportedly is currently dating 22-year-old model Dylan Penn. But one person who isn't necessarily onboard with their relationship  besides Kristen Stewart, natch  is Dylan's intimidating father, actor and two-time Oscar winner Sean Penn.

Dylan is the progeny of Sean and ex-wife Robin Wright. And The Sun is reporting that 53-year-old Sean is worried that Rob might not be looking to get serious with Dylan and may end up breaking her heart.

"Rob and Dylan get on well and really fancy one another," says a source. "It’s obvious Dylan is smitten."

"But Sean had a chat with Rob recently," the insider adds. "Sean knows what it’s like to be a young, successful actor and the beautiful women that come with it." Indeed, Sean has been linked over the years to such sexy ladies as Madonna, Scarlett Johansson, and model Elle Macpherson.

So what did the Milk star tell Rob during this little sit-down? "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," the source added. Who knew Sean was such a hands-on dad?

Frankly, we're impressed if Robert was able to stay composed while Sean was warning him not to toy with hid daughter, since Sean is definitely a stern dude. Still, we can't really see Rob as the type to lead Dylan on, so we don't think Sean really has cause for concern.

But if Rob does mislead Dylan, it's safe to assume that he's a dead man walking.

Source: The Sun