Hi @Charlee5.
All sounds fishy to me.........
If the host asks for a security deposit, it is usually in the “additional costs” VERY visible to the guests and Airbnb. Any other monies are asked for via the Airbnb Resolution Centre.
DO NOT PAY the host any monies outside the system, in case it is a scam.
DO NOT CANCEL your booking.
Let AIRBNB contact her and investigate.
Let Airbnb cancel without penalty to you.
If contact has been via email or text message, screen shot these for Airbnb.
MAKE IMMEDIATE contact with Airbnb and explain to them what has happened. Has she been contacting you through the Airbnbmessages site?
Asking for money under these conditions -the host is breaking the Airbnb terms of service and sounds like they should not be an Airbnb host.
Passports can be sighted on arrival. (But Paris hosts may have some special requirements I do not know about)