Joaquin Phoenix is a pretty flirty man. I went to visit my friend in LA (she was living at the Chateau around the same time while her house was being renovated) She, her boyfriend and I went to the bar one night - I went to the bar to get a drink, and he came up and was extremely...amorous. He was very nice, though. Very, VERY touchy. He asked me if I wanted to go to his room and order some room service LOL. I said no. I remember my friend AND her boyfriend kept telling me "what the hell is wrong with you??? you should have gone!!!!" haha
I've also had some friends who live here in NYC say they've met Balthazaar and that he was a dog. Very flirtatious and nice, but despicable - one even knew he and his wife as a couple, yet he kept on trying to make it with her!
I know that all sounds very prattle-y and such, but it always make me laugh. I do think what shes doing is extremely hypocritcal - she bitched endlessly about Jude and their "nanny" yet somehow it's completely OK to be having an affair with a married man with children. While it doesn't surprise me on Balthazaar's end, I'm rather surprised that someone who has been cheated on, would do that. But, honestly that is all Sienna Miller is known for - not for her less than mediocre "acting"