@JeanFrancois9 sorry to hear that! I would recommend sending her a message through Airbnb the day before check out reminding her about the check out time.
You should be aware that in Airbnb's Terms of Service there is a provision for what happens when a guest overstays beyond the check out time:
"8.2.2 You agree to leave the Accommodation no later than the checkout time that the Host specifies in the Listing or such other time as mutually agreed upon between you and the Host. If you stay past the agreed upon checkout time without the Host's consent (“Overstay”), you no longer have a license to stay in the Accommodation and the Host is entitled to make you leave in a manner consistent with applicable law. In addition, you agree to pay, if requested by the Host, for each twenty-four (24) hour period (or any portion thereof) that you Overstay, an additional nightly fee of up to two (2) times the average nightly Listing Fee originally paid by you to cover the inconvenience suffered by the Host, plus all applicable Guest Fees, Taxes, and any legal expenses incurred by the Host to make you leave (collectively, "Overstay Fees"). Overstay Fees for late checkouts on the checkout date that do not impact upcoming bookings may be limited to the additional costs incurred by the Host as a result of such Overstay. Airbnb Payments will collect Overstay Fees from you pursuant to the Payments Terms. A Security Deposit, if required by a Host, may be applied to any Overstay Fees due for a Guest’s Overstay."
So if the guest over stays hours beyond check out time, you can point out this section in the Terms of Service which she agreed to when she created her Airbnb account. This is would certainly get her attention!
Hope this helps, Jean!
