I hope she has met him in person before and they are just meeting up again because Doha is a long way from the US. It sounds like she will be here without friends, family or support of any kind and she doesn't have an understanding of the culture. If she finds herself in trouble with this guy - who can she turn to for help?

Blue.... I hope it all works out for you but one thing you absolutely need to do is register with the US Embassy in Doha before you make the trip. You can do it online at http://qatar.usembassy.gov/registration2.html

I wish you all the best.