@Amanda1749
it is a 3rd party booking, which is not allowed. Even if the booker adds the husbands Airbnb profile to the reservation (making it a stay for 2 persons !), then it is still a 3rd party booking if the booker will not join her husband on the trip (or more specific: if the husband will not join his wife on the trip, as the wife is the main guest).
So the options are:
- If still within full refund time period , ask the guest to cancel
- Contact Airbnb and ask if they will support this booking, if not they need to cancel it (without penalties for you)
- Continue with the booking.
- Cancel yoursell (with penalties !)
Please note:
You accepted the reservation, although already informed about the "husband" situation, but not reading it
This is weakening your position when contacting Airbnb