After a few days, come up with a story you had a sudden death in your family, and that the only way for your two adopted stepchildren will survive is if you fly them over to Zimbabwe (or any other country located on the other side of the world) for a life saving operation so they will survive. As a bonus, you will also receive two million dollars that was set up in a trust fund, by a rich uncle but the only way to get it is in person.
At that point ask her to wire 2000 dollars to your local Walmart so you can pay for the ticket, and once you get the money you will give her a million of it just for helping you out.
Totally legit transaction.