Once you have the account on an exchange and you have coin (such as USDT) in it, then it's only a few commands to get it sent. The more security features you've opted for (which is better) the more strokes.
Thanks for Bitazza, will check it out. Yes P2P is common all over the world. Better to network with others, find trusted providers, etc. A very easy form of 'banking'.
This was my suggestion. She will need a cryptocurrency exchange account, to offramp the crypto you send her into Baht in a bank, but it shouldn't be difficult to do, and it will cost you PENNIES to send her money.
Also, she can avoid offramping via a bank by exchanging the crypto for cash with a trusted P2P partner. (Charge will be 1-2%) This is a not uncommon side-business for people all over the world.