@Julie1516
If her request for a refund came 5 days after, that means there are 9 more days until the cut off time for reviews end. So try and stall her for 9 more days the best way you can. Be creative. If you intend to say, refund her 50% of her stay if this came to a dispute, you can do that but she may still leave a review. If you are just as concerned about the review as the money, the key is to get her to miss the review period.
Day 5-8 : You may say something like- you will see if your insurance will cover some form of payment and will get back to her in a few days- obviously B.S but you get back to her on day 8.
Day 9-11 : Say "after lots of back and forth with my insurance company, they said no but I will see if the insurance policy of airbnb will cover it and give me 1-2 days to see if they will do this"
Day 11-14 : Say you tried both avenues and insurance won't cover it and that you will send her money back in increments since your bank account setting only permits you to send a certain amount of money per day (say $50 or $100). After day 14 when she can't leave a review, stop refunding her. If airbnb later says that you mentioned you will refund her, you say that you never agreed to a full refund. That all you said was that you would send her money back but never specified as to how much. That is why it would help to be vague.