1 of 9
ON HER OWN
Since her fiancé, Jude Law, admitted last week to cheating with his children's nanny, Sienna Miller has channeled her energy into her work. A day after the story broke, the actress, 23, was back at London's Wyndham's Theatre on July 18 (left) – sans her engagement ring – for her role in As You Like It and, after management gave her a night off, returned July 20 looking more relaxed.
2 of 9
'ASHAMED AND UPSET'
Meanwhile, Law, 32, also went back to work, looking glum on the London set of his movie Breaking and Entering on July 21. In a statement released after nanny Daisy Wright revealed their affair to Britain's Sunday Mirror, Law said: "I am deeply ashamed and upset that I've hurt Sienna." Says a source close to the actor: "He's going through a tough time. It's very hard when you have to live out your life and your mistakes in public."
3 of 9
Daisy Wright, 26 (with Law and sons Rafferty, 8, and Rudy, 2, in Louisiana in February), says she and the actor began their month-long affair in March while he was in New Orleans filming All the King's Men. Wright, who recorded details of the tryst in her journal, told the Sunday Mirror, "He is a great lover and knows how to satisfy a woman."
4 of 9
HELP FROM HER FRIENDS
Miller has gotten support from celeb pals such as Sean Penn (Law's costar in the upcoming All the King's Men) and designer Matthew Williamson, and on July 24, she hit the Cartier International Polo event, where she chilled with onetime beau Orlando Bloom (left). Although the exes looked cozy, his rep says Bloom is still dating Kate Bosworth.
5 of 9
Two weeks before the news of his affair broke, Law and Miller looked blissfully in love July 3 at the Wimbledon tennis tournament in London. On Miller's finger: her $35,000, nine-diamond platinum-and-gold engagement ring. After Law proposed on Christmas Day last year, she told reporters, "I'm the happiest girl alive."
6 of 9
MOTHER KNOWS BEST
Miller hasn't commented about Law's infidelity, but her mother, Josephine (in London in June), has. "We were really hoping that Jude was the right guy for Sienna. Now we just feel totally betrayed," she told reporters the day after the Sunday Mirror story was published. "He's a bloody idiot, and you can quote me on that."
7 of 9
THE WAY THEY WERE
Miller (with Law near the All the King's Men set late last year) often flew to see her man while he was filming in Louisiana – but Daisy Wright claims her affair with Law began immediately after one of Miller's visits, and that Law complained that Miller didn't spend enough time with him.
8 of 9
Also speaking out on Miller's behalf: Sadie Frost, Law's wife from 1997 to 2003. "My heart goes out to her," said Frost (in London in 2002, just before Rudy's birth, with Law, Rafferty and daughter Iris, now 4), who hired – and fired – Wright. "I will talk to her if she calls me."
9 of 9
WHAT'S IT ALL ABOUT?
Miller and Law met in New York City in 2003, while preparing to shoot Alfie, in which Law played, ironically, a womanizing rogue. Now that Law, like his character, has been unmasked as a cheater, the question remains whether Miller will forgive him. As a friend of the actress tells PEOPLE, "She needs some time to sort this all out."