I don't suppose going topless around your boyfriend's kids (Jude Law, btw) is the most appropriate thing to do, and it seems Sienna Miller would agree, which is unfortunate, because it's usually around this time of year that we get a ton of Sienna Miller topless bikini pictures. I guess we'll just have to make do with regular non-topless Sienna Miller bikini pictures. It's a rough life.
And yes, the gold buttons on her bikini top do look like shiny nipples.
Photo credit: Splash News