Sienna Miller Says Monogamy Is 'Overrated' Her then-fiancé Jude Law apologized for an affair last year, but Sienna Miller has her own issues with monogamy, she says in a new interview. "I don't know, monogamy is a weird thing for me," Miller, who is still seeing Law, tells Rolling Stone in its new issue. "It's an overrated virtue, because, let's face it, we're fing animals." She says she was upset by the scandal Law admitted he'd cheated with his kids' nanny because it drew attention away from her acting. "Everything happened in the wrong order," she says. "You become very known for being someone's girlfriend, and all of a sudden there's all this hype and buzz for all the wrong reasons." Now in Pittsburgh shooting a film adaptation of Michael Chabon's novel The Mysteries of Pittsburgh, Miller, 24, says she's already worried about getting older. "It's so hard for women in this business. And I want to be doing this when I'm 50." She also says she "can't wait to have babies." "Jude has three children," she says of Law, whom she met on the set of Alfie in 2003, "and I have never tried to be their mum or anything, but I've had the benefit of living with them and loving them without being the parent. But I love the idea of being a working mum and having my kid on the set."