@Jeanne246
auuuu 😄 😄
it seems you have a third-party reservation which is not allowed (as you see for a good reason) and it is a really tricky situation.
If you discuss it with your guest she may cancel her reservation and ask for a refund for the rest of her stay. You will lose some money.
If your booking is on husband's name he can cancel the reservation and the result will be the same as above.
If the husband shows on the door and you refuse to let him in he can call Airbnb and Airbnb will cancel the reservation ON YOUR BEHALF because you didn't let him in (reservation is on his name remember)
So, whatever you do it is not good for you I am afraid.
This is just another reason why hosts want to see guests profile photo on Airbnb and why some smart hosts ask for photo ID on arrival. You just never know...
For now, I would tell the husband "I do not discuss guest’s Reservations"