Nad,
OK, from the little you have told here, it's very possible that the agency is trying to get some EMF's rolling in to make some extra monies from her. Now, .... when you say private email , do you mean the emails that get translated by the translator at the agency, or her actual private email address ?? Agency emails normally start with the lady's name and have a 3 digit number after the name, virtually all are yahoo accounts.... If she is using her own private email address she could well be breaking her agency contract.
Having said that, the agency would still be rubbing there hands together, at the thought of the marriage fee coming there way, and wouldn't care much about the odd EMF fee's there losing.
I can't honestly see why your lady would jeopardize your relationship so near to your wedding plans, unless of course she is having seconds thoughts, which doesn't seem to be the case according to your post above.
David....