Dear friend ,
Congratulations for getting friend with benefits .
She is stranger unless you meet her personally , Online world is more dangerous ,
I feel you should first meet her at common place , like coffee day or restaurant etc , you meet her for at least few days daily , that will give you judgement , Then make a room for sex , it should be your place i.e hotel booked by you, hotel should be well known and reputed one in the city.
Your close friend should be known about it.
Security and safety should be first preference .
Condom First
if possible - do the HIV test also.
If every thing is ok , go ahead and fuck her .
ALL THE BEST .