For the past few months, the world has been learning more and more about Miley Cyrus' boyfriend Patrick Schwarzenegger, the son of the "Terminator" actor and his ex-wife Maria Shriver; now, after a few months of undying love, it seems young Patrick is following on his father's footsteps and actually cheating on his pop star love.

Though there was never a statement officially confirming that Schwarzenegger was Miley Cyrus' boyfriend, the young couple was seen kissing very publicly in November, as well as walking the red carpet together and even seen hanging out with his mom, Kennedy royalty Maria Shriver - but perhaps things have just come to an end now.

According to TMZ, the latest news about Miley Cyrus' boyfriend sees him doing the one unforgivable act: cheating. The gossip outlet shows the young model partying with a few friends in Mexico for spring break, including Taylor Burns (his ex-girlfriend) and another hottie, in what looked fairly hot and heavy as he was showing some serious PDA like getting suntan lotion on his back courtesy of Ms. Burns.

Hollywood Life reports that, of course, the public behavior of Miley Cyrus' boyfriend has the star in absolute anger flames - she even posted a seriously disturbing picture on her Instagram with a scene from the classic horror film "Rosemary's Baby," where Mia Farrow can be seen yielding a knife.

Cyrus simply captioned the photo with the words "Current Mood," saying nothing further - however, considering the way Miley Cyrus' boyfriend has been making headlines over the past few days, it's a sure thing she's talking about Patrick.

Besides the fact that the news itself is pretty sad, it comes at a terrible time, as apparently it was only recently that her mother-in-law Maria had started to warm up to her, as only a few days ago they were seen sharing a dinner at a Los Angeles restaurant.

Hopefully, the whole issue between the "Wrecking Ball" singer and Miley Cyrus' boyfriend is just a misunderstanding - but the singer is definitely angry over it for now!