Have you ever saw ur woman even in skype? Do you know exactly that she exists? Or u have only letters and photos from her? I ask cause the most popular for fakes is to ask straight money for trip by agency. All mysteries that she makes around your relationships are very strange. Frankly speaking here is really easier to buy a rip than to make a visa by invitation. Try to offer her to send money straightly to agency without giving her cash. You will see the result. Best wishes