<prompt> Human: I just got my new credit card a few days ago. Would it help her credit to be on my new card? She recently applied for one of those airline credit cards and was declined. She currently has one credit card through our local credit union but I believe that it is secured. I want to help her with building her credit early shes 19.And yes, I do trust her completely not to go spending wildly on my card. She is quite responsible.  <response>: It would help her much more if you added her to an older card. 