EXCLUSIVE: Amber Heard Rocks Tiny White Bikini on Brazilian Vacation With Johnny Depp

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Amber Heard is in Rio de Janeiro, Brazil for her husband Johnny Depp's latest tour stop, and ET has exclusive shots of the actress hanging poolside in a skimpy white bikini.
Depp, 52, is travelling with his band Hollywood Vampires, featuring Alice Cooper and Joe Perry, and according to an eyewitness, Amber's sister Whitney came along for the trip. The siblings were seen lounging by the pool at the Copacabana Palace hotel for 40 minutes on Thursday before Amber headed off to watch Depp perform, an eyewitness tells ET.
On Wednesday, Amber and Whitney were spotted shopping around town while Depp had a sound check.
While Amber, 29, and her younger sister have been getting in as much quality time as they can, an eyewitness reports that when Depp is at the hotel, Amber does not leave his side. The couple, who are staying in the hotel's presidential suite, have reportedly been showing off a lot of PDA -- hugging and kissing in the South American city.
Heard and Depp haven't had great luck with overseas trips lately, as Heard was charged in July with two counts of illegally importing their dogs, Pistol and Boo. During an interview on Jimmy Kimmel Live! earlier this month, Depp said that the couple was "under the impression [they] had all the paperwork done for the dogs."
When asked about the threats to put Heard in jail over the allegations, Depp became protective, saying, "If they did that, I'd just fly to Australia and assault that man, so that I could got to jail."