Kate Middleton fears for her future with Prince William after a shock revelation.

Kate Middleton has been left distressed by a family shame that's put her big wedding plans in jeopardy.

Shockingly, Gary Goldsmith, the only brother of Kate's mother Carole, was filmed by undercover reporters laying out cocaine on his kitchen bench and smoking marijuana joints.

A friend of Kate's says the princess-in-waiting is devastated. She's desperately worried about how the drug scandal will affect her marriage plans after the palace put pressure on Prince William to end the relationship.

'She's been trying so hard to stay out of the spotlight to prove to the royals she's wife material for William,' a friend of Kate's says. 'But now her own family has dragged her down!' 

New Idea's royal insider reveals the Queen is irate after learning William and Kate, 27, once stayed with Gary at his $12 million mansion on the Spanish island of Ibiza.

He and Kate were due to visit the Queen next month at Balmoral, where the prince was set to seek his grandmother's approval to marry Kate, but the plans are now up in the air.

During the sting Gary, 44, also told the reporters that the pair would announce their engagement this year.

All the drama began when Gary invited two undercover reporters back to his mansion - crudely named La Maison de Bang Bang - after meeting them at a nightspot. He reportedly offered them drugs and at one stage asked, 'Do you want to chase the dragon?', which is slang for smoking heroin off tin foil.

Sting in the tail

It's claimed he offered the reporters cannabis and ecstasy, plus a contact for high-class prostitutes costing $1500 a night. Gary also said supermodel Elle Macpherson was his associate.

Perhaps most alarming is the fact Gary bragged openly about William and Kate, demonstrating none of the discretion required by those connected to the royals.

Gary spoke in detail about his meeting with the prince in 2006, when the couple stayed with him, boasting he'd addressed William using a four-letter expletive. He also gave an insight into Kate's relationship with her prospective in-laws, revealing she had confided in him that Prince Philip had taught her to shoot.

And he revealed some rather embarrassing details of a chat at his sister's dinner table, accusing William of making vulgar remarks about the size of Kate's breasts.

Gary's girlfriend, former lap dancer Antonia Bourke, was just as indiscreet. She claimed they were due to meet up with Wills and Kate in London for lunch. She said, 'We're going to see their little romance blossoming.'

Insiders warn Gary's greatest offence is his inability to keep his mouth shut. As our royal observer explains, 'Discretion's everything.'

'The last thing the royal family wants is someone spilling the beans on every last detail about how they live their lives behind closed doors!'

Associates of Gary describe the former IT recruitment specialist - who has amassed a $60 million fortune - as being an accident waiting to happen.

In fact, he was issued a stern warning by security services just a year ago about his wayward party-boy lifestyle.

'I've got to keep a low profile and be a good boy,' he allegedly told friends. 'I'm going to stop all the drugs and clean up my act.' His claims indicate there had been long-standing concerns about his behaviour - begging the question as to why William and Kate had been allowed to visit him and stay at his house.

Kate's parents Carole and Michael Middleton were regular visitors to Gary's palatial Spanish villa - and are also said to be furious about the revelations.

Carole has long expressed her dismay at her brother's out-of-control behaviour, even describing Gary as unreliable and a waste of space. She was desperate to get him back on track, and even begged Gary's ex-wife Julia Leake to abandon her plans to leave him  because he obviously needed her help so badly.

But Julia, 32, ignored Carole's pleas, saying, he's a lovely guy in his heart of hearts but I just can't help him anymore. He needs to go to rehab and sort his life out. 

 

A friend in need

As for Kate, friends are rallying around, offering whatever help they can. While Wills and his brother Harry played polo, Kate was on the sidelines being comforted by pals.

And her Prince Charming was a knight in shining armour, even overheard telling his girlfriend of eight years 'I want to marry you, not your family.'

But she knows she'll be forced to weather the scandal on her own all too soon.

William's about to return Wales where he's training to become a RAF search and rescue pilot.

Kate is due to fly out to the Caribbean this week with her family, and there's no doubt she will have plenty to think about.