Right, he runs at a breakneck speed to the Western Union office and sends her several hundred dollars for computer, internet connection, surgery of her Mom, and financial support for his robbed loved one. It is his second to the last, but most expensive virtual contact with her. The last one is his message to her with the control number for the Western Union service. After that F disappears forever. She just once unwittingly made a unintended mention of them, but if M insists her to tell him about her financial problems, she softly but aggressively stops this discussion - it is HER problems.
Money is needed all at once.
Now I'd like to tell you about groups of people which create virtual matrimonial services especially for scam or use already existing services for that purpose. I know that such collectives exist and their activity makes victims of many luckless, trustful seekers of a Russian wife. Long ago I created a site with young Belarusian photo models. While building that site, I made the acquaintances of many young pretty girls-models, and with some of them I am still in contact. This is how they operate.