OP here....
My boyfriend does not tease me relentlessly about it. I have brought it up and he still thinks his daughter was right because I gave her the card. My feeling is that I didn't really give it to her, I was letting her use it. The look on her face when she said she cashed it in ticked me off and so I was a little sharper with her than I would have been otherwise.
A little more background: as I said my bf paid for her trip and her husbands. I paid for my own. I was resentful that he invited them to come in the first place but I was going to make the best of it. The daughter stuck to her dad like glue and he paid for everything...food, trips, drink, and anything that caught her eye. She makes handicraft stuff and was trying to sell it to other passengers on the tour. She took photographs that she was going to print and try to sell. Her dad paid for everything yet she was going to try to make the trip a moneymaking one for her. This bugged me.
So, when she cashed in the internet card, I immediately was resentful that she was using me to get more money. Petty of me? Probably but there it is.