I don't think she is pregnant in those pics, the fact is that most of photographers hide her belly with dresses.
In this pics for example http://www.bigtitsnews.net/img/080317/tn_eden_mor2.jpg you can see that she has belly
while in all these others belly is completely covered by the position or some dress: http://www.bigtitsnews.net/category/laura-orsolya