To add to what Chuck posted, I think you can set up a second folio so that your parent's room charges could be separated out from yours and billed to a different credit card.Unless there have been some system upgrades, all the on site charging will bill out to one room.
To add to what Chuck posted, I think you can set up a second folio so that your parent's room charges could be separated out from yours and billed to a different credit card.