Hmmm - I'd say that link is 75% likely to be false, especially since the profile hasn't been filled in. But why wouldn't she be looking to move to the West and marry some sugar daddy - it happens. The other ads on the site look genuine. Using the site form I've pointed out that the picture is taken from SweetNaturalGirl and asked them for "clarification", suggesting if it is indeed for real that they should use a picture of her taken from another source.
But even if it was her and you happen to be rich, marriage-minded American, be careful. As you learn here http://kissagency.com/about.htm , " Foreigners admit that Russians dress very neat and stylish. It looks like they wear designer clothes for any occasion."
Let's hope your credit cards have a big fat limit. Otherwise you could end up like this guy:
http://news.bbc.co.uk/1/hi/england/southern_counties/4841094.stm