Lets see...
1: the dominant lied to your friend and then tried to hide it by telling her not to look.
2: your friend is quitting her own life and moving to a new country to be with someone who lies to her.

My first reaction would be to end the relationship before someone (meaning your friend) gets very badly hurt. If she'd already moved and then faced such a serious breach of trust she would have been in a bad way. Better to end it now rather than offer a second chance that likely will lead to her facing another breach of trust later.