Sienna Miller

Sienna Miller's steamy affair – and much of her body – has been exposed now that the barely clad actress has been spotted kissing married Balthazar Getty in a boat off the Amalfi coast.

Miller, who had a roller-coaster relationship with Jude Law and broke up with actor Rhys Ifans only weeks ago, has been quietly dating Getty for "at least two months," said a source.

Miller, sporting a sailor's cap, was also spotted topless on the balcony of an Italian hotel room kissing Getty. Meanwhile, the Brothers & Sisters actor, 33, and his wife Rosetta "have been living separate lives for a while," a source tells PEOPLE.

Getty, who has a tattoo of his wife's name on his chest, married Rosetta in May 2000. They had their fourth child together 10 months ago.

"It's humiliating," a friend tells PEOPLE. "Rosetta left the country to protect the kids, and he continues to see Sienna publicly."

The two met through Getty's Brothers & Sisters costar Matthew Rhys. Rhys, who briefly hooked up with Miller, was livid when the photos of the couple surfaced, says a source.

Balthazar Getty, who has been photographed smooching actress Sienna Miller, has announced that he's splitting from his wife Rosetta Getty, with whom he has four children.

"The breakdown of a marriage is a very difficult and painful experience especially when children are involved," he said in a statement released Monday. "In light of the fact that many pictures have surfaced in print and on the Internet which has caused myself and my family great embarrassment, I felt it necessary to at least acknowledge publicly that yes indeed my wife and I have separated and I will not be commenting any further."

The Brothers & Sisters actor, 33, was recently seen with Miller, who was topless, in a boat off the Amalfi coast.

A friend told PEOPLE that Getty's wife is upset by the public affair. "It's humiliating," a friend said. "Rosetta left the country to protect the kids, and he continues to see Sienna publicly."

Clare Bear wrote: »

Is she? I liked her in Alfie...then again I think I was the only person in the world that actually liked the remake. Don't think I've seen her in anything else but she comes across nice in interviews.

Sienna Miller has been left heartbroken and in tears after reportedly being dumped by Balthazar Getty – just three weeks after she was pictured frolicking topless with him on a yacht.

According to the Daily Mail, Sienna has been left red-faced after Getty – heir to a £2.5 billion oil fortune – left her in New York and flew to Los Angeles for a reconciliation with his wife, Rosetta Getty.

Sources close to the couple say he told Sienna that he had to return for work and to see his four children.

But it is understood that Rosetta, Getty's wife of eight years, has agreed to take him back.

Balthazar and Sienna drew gasps when they were pictured just three weeks ago snogging and flirting on holiday on the Amalfi Coast, where they stayed at his family's holiday home.

But now, according to reports, his 38-year-old wife had been persuaded to allow him back into their home after several days of pleading.

A former drug addict and alcoholic, Getty still receives counselling and friends believe his infatuation with Miller began after he started drinking again and stopped attending counselling sessions.

Getty confirmed two weeks ago that he had split from his wife. Since then, he has reportedly had a change of heart after allegedly bombarding Rosetta with apologetic emails.

Sienna has received criticism in the press for dating a married father of four, with some critics even suggesting her coloured love life may even affect her wishes to be taken seriously as an actress.

Meanwhile, Rosetta, who runs her own fashion house, is said to be a powerful influence in Hollywood, with friends including Demi Moore, Courteney Cox and Patricia Arquette.

Sienna Miller has admitted that she is tired of being portrayed as a "slut" in the media.

The actress, who is currently facing a backlash over her romance with married father-of-four Balthazar Getty, insisted that her image has been damaged by exaggeration and lies in the press.

"The biggest misconception of me in the press is that I'm a slut. Apparently I've slept with half of Hollywood," Sienna told S magazine. "You say, 'Hi, nice to meet you': the next day in the papers you're pregnant with his child."

Miller added that she struggles to deal with attention from paparazzi photographers, but tries to see the funny side when she is followed by snappers.

"The media is a bigger animal than I ever will be. It just becomes this soap opera. And I guess I had a pretty good few episodes," she explained. "You feel like it's a video sometimes. I play these games to make it more amusing, like I'm Lara Croft or something. So I find myself ducking behind cars."

Miller's North London home was recently targeted by vandals, who spray-painted the word "slut" on one of its outside walls.

Actress Sienna Miller has decided to move away from her native Britain, following a barrage of negative press over her relationship with married actor Balthazar Getty.
The Alfie star hit the headlines after pictures emerged of her frolicking with the father-of-four on a yacht off Italy's Amalfi coast in July.
She has since faced a variety of setbacks, including an attack on her London home in which graffiti hooligans sprayed the word "slut" onto brickwork.
And now her step-mother, Kelly Hoppen, insists the star plans to move abroad to escape the media spotlight.
She says, "It's disgusting that she can not live in her own country. Now she's going to have to leave the country to get on with life. She can't live here now.
"Why is it that if a man leaves his wife the new woman gets all the s**t? That doesn't happen the other way round."
But Hoppen insists that Miller is not letting the negative stories upset her.
She adds, "We try not to read the papers anymore. She's actually doing fine. In fact she is great. But we've only read one positive article about her ever."
Miller was recently rumoured to be viewing properties in California with Getty - prompting speculation that she will now set up home in Los Angeles.

Sienna Miller has accepted £15,000 in damages from the Daily Star after the newspaper published a paparazzi photo of her. The 26-year-old actress took action against the paper which she claimed had violated her privacy. The Daily Star said it accepted she was "extremely harassed and distressed by persistent pursuit and intimidating tactics" adopted by paparazzi photographers, adding: "We apologise to Sienna for publishing this photograph." In January the star won a High Court privacy case after a photographer took nude pictures of her without her consent. SOURCE: BBC