I don't know. And those things are relative. In my country, the brides can choose whether they would like to use veil or not, what would the veil be like. And in most of the country, you can do so. It doesn't mean that you're a virgin when you wear a veil, you can wear it if you feel like you wanna. If you don't, well you won't.
That's possible though, that she wasn't virgin, but it's also possible that she was virgin. What's our business in it? What's the matter anyway? She's a princess now.