Nothing will come of it, she's blackmailing you and she can be jailed for that.
But for your own protection, type out a full statement of what happened as you remember it.
Do this NOW before you forget any details, and include EVERYTHING that happened and was said. Including all subsequent communications.
If it's easier to do it in your own language and then translate afterwards then do so, but make sure you keep both versions.
You'll probably never need it, but it's just in case the police do come to see you: it's better to be prepared now than have to answer questions in a foreign language in a hurry
Do not delete any texts or WhatsApp message
If she demands money, tell her if she repeats the demand she will be reported for blackmail