Please take this advice to heart, the scammers are quite clever, many are chatting to lots of guys at once and they will spend many hours online allowing the "relationships" and the "trust" to mature somewhat before they will ever even think of asking for money. The really clever ones will never even ask, they will just tell you their sob stories and wait for you to offer.
A real genuine Filipina would probably be to ashamed to ask someone she has never met for money. So if she does start to ask, tell sob stories or drop hints, the best thing to say is "I would never dream of sending money to someone I have never actually met". You'll soon know what the score is if you say that, a professional scammer will drop you like a hot potato and move on to the next guy.