Family Sharing doesn't allow multiple credit cards for adults?
My sister organized a family sharing with our iPhones and entered her credit card. Despite having my own credit card entered into my Apple ID, whenever I try to buy something from the iTunes store, it makes me verify her credit card number with the 4-digit security code, which we don't share with each other. How can I be on family sharing with her and still be able to use my own credit card for purchases? Thanks, Community!