Maria Shriver reportedly isn’t exactly approving of her son Patrick Schwarzenegger’s new girlfriend, Miley Cyrus, who also happens to be one of the most famous pop stars in the world.

Since they started dating a few months back, they’ve been seen partying hard in various states across the U.S.

Sources told Page Six after days of Cyrus and Schwarzenegger partying in Miami during Art Basel, Shriver was booked to fly into town but canceled her trip when she realized what her son was up to.

During their time in Miami, Cyrus performed in pasties and smoked weed onstage, reportedly made out with Paris Hilton and partied hard at E11EVEN several nights in a row.

“There’s no way Patrick can be linked to drug use; his family is American royalty,” said a source, adding, “Patrick is anti-drugs, but Miley doesn’t give a [bleep].”

On Friday night, Shriver posted a link to a video that advises parents how to talk to their kids about partying.

“My sister-in-law Linda shared this Worth showing yr kids & talking to them about who they are & will be this weekend,” she wrote.

image via Twitter from Maria Shriver

image via Nancy Rivera/ACE/INFphoto.com