Who’s Paying For Bridesmaids Trip? Leo and Rebecca Buzz Question

Leo and Rebecca Buzz Question. I'm in a wedding and the bride to be has booked a trip for all the bridesmaids and I thought that was cool until she DROPPED ON ME THAT I'M SUPPOSE TO PAY FOR MY PART...I thought she was providing the trip. I truly can not AFFORD this trip, but all the bridesmaids are already booked.