We had a French friends 16 year old DD to stay for a week, she was a pleasure to have. When I was taking her to the airport Flybe said that she had to check her bag in the hold and it would cost £30 to do so. I argued the point (not for very long because I had to rush off) but the would not budge. Friend's DD did not have £30 or a plastic card so I paid this for her so that she could fly. French friend now says I should not have paid it and need to claim my money back from Flybe not from them.
AIBU to think French friend should reimburse me?