Just for interest, and because Ive read a lot about people being scammed in relationships recently, how long IS it before people start to realise that the relationship is not all that it seems.

Ive read of people that have even visited they're girlfriends, met families and friends etc, and found out afterward that they were, still being scammed.

I'm puzzled as to how this can work. Am I being naive? or are these girls absolute master con artists?