Miley Cyrus is trusting Patrick Schwarzenegger not to do anything "silly" at Coachella.

Patrick Schwarzenegger and Miley Cyrus

Patrick Schwarzenegger and Miley Cyrus

The 21-year-old actor invited the 'We Can't Stop' hitmaker with him to the music festival but despite cheating allegations rocking the pair's relationship, Miley says she wasn't "interested" in attending the event alongside him.

A source said: "Patrick asked Miley if she wanted to come with him, but she said she wasn't interested. She's putting her trust in him not to do anything silly or compromising while he's there having a good time with his bros.

"He realised what predicament he got himself into in Cabo, and now knows he's got to be smarter about being in a high-profile relationship."

Meanwhile, the 22-year-old singer is believed to have been "punishing" her other half, after he was photographed getting close to his ex-girlfriend, by refusing to be intimate with him.

Another insider added to "One thing she did to punish him was withhold sex from him.

"Their love life is absolutely wild and he loves it. But he had to take a lot of cold showers for the first couple weeks after his trip because of her sex ban."

And Patrick has been working hard to win the star back, sending her roses and romantic e-mails.