Consider the motivations of both Nev and Angela:
I think that Angela had the motivations to do this because of her life and the situation that she is in. From the looks of the movie, it seems as though her life is hard. I think that she just wanted to escape her current life and make up a life that she likes better. Nev had the ,otivstions to follow this through because he had really fallen for the girl that was cat fishing him. When he realized that he whole thing was a lie, he wanted to get to the bottom of it and figure it all out. I think that both parties had strong motivations for doing what they did.