Miley Cyrus is "devastated" by claims her fiancé Liam Hemsworth's brothers have tried to persuade him not to marry her. Liam's siblings Chris and Luke reportedly staged an intervention over his plans to tie the knot with Miley, apparently questioning his marital intentions. The songstress is said to be dealing with the situation badly. "Miley was hurt and shocked when she heard what Liam's brothers tried to do. They wanted what's best for Liam, but it has devastated Miley more than anyone realised. She loves his family and has always valued their opinions. She just wishes people would let her and Liam be happy," a source told British magazine Star. "She's been back out partying again with friends, trying to put the whole incident out of her mind - although she's going to have to face Liam's family sooner or later. But she's terrified as she thinks they're all against her now. She feels betrayed that they'd do this behind her back. "It's caused more tension between her and Liam and Miley is now worried that Chris and Luke have now influenced him as she and Liam have increasingly been spending more time apart since the brothers' talk." Last week it was claimed Liam's relatives were determined for him not to tie the knot with Miley. "They want him to end the romance for good," a source said. Liam, 23, and Miley, 20, have been in a relationship for almost four years and got engaged last June. They have recently been spending lots of time together 4music