Miley Cyrus and Patrick Schwarzenegger haven't been together for very long, but their relationship is apparently causing friction between his parents.

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A Schwarzenegger family friend revealed to Hollywood Life on Monday, "Miley and Patrick's relationship is causing a lot of tension in his family. It's creating a fissure in Arnold and Maria's already tense relationship - and it's affecting all of their children." 

Arnold and Maria Shriver are separated and their divorce was in its final stages as reported by MailOnline in September. According to that report it should be finalized by now.

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Shriver supposedly distastes Cyrus dating her son. There have been various reports, including Hollywood Life revealing that Shriver banned the singer from the Kennedy Christmas celebration and she was reportedly outraged over Cyrus' behavior during the pop star's birthday celebration as reported by Hollywood Life too.

Arnold on the other hand has been said to come around to Cyrus. The source revealed, "Arnold loves that Patrick is dating Miley."

Arnold took Cyrus and his son to Idaho. "He's been showing her off around Ketchum to all his friends," the source revealed of Cyrus' beau.

"Arnold loves being in the spotlight and is really enjoying all the attention Patrick's relationship with Miley is getting. He's proud of Patrick for dating such a sought after girl like Miley. He compares it to dating Madonna at the peak of her fame," the source added.

Arnold's acceptance of the singer isn't sitting well with Shriver though apparently.

"He told Maria to relax and let the boy be a boy, which didn't go over well with her at all. She hates the whole circus that surrounds Miley and it upsets her the Arnold is okay with it," the source said.