Sisters are a strange group. They come from the same gene pool yet can be polar opposites. Case in point, Finja Martens, a blonde German whose sibling, Nike Martens, is also an actress. Nike, also a stunning blonde, doesn't run in the same skin crowd as her more revealing sister. While Nike has never flashed the flesh, Finja has at least briefly exposed her appeal skinny-dipping in the soap opera Unter uns. That puts her T&A above her sister . . . for now. It's your turn, Nike, to catch up. There’s nothing like a little sibling rivalry to get you motivated.