This store has a great cosmetics department. Tell her you don't want her evil card. You tried to be good, but you've about maxed out four credit cards. Call the credit card company to try to work out a payment plan. You can't imagine this ever happening to you, but you suppose you'd call a financial or credit advisor about how to proceed.
Every stop is plotted and there are no surprises.
When you see something great that you know someone will like, you buy it. You'll have a couple of months before the bills need to be paid. You float along starry-eyed looking at all the great possible gifts, but try to stick to the list of ideas you brought with you. Plan a budget, but use a credit card for gifts and local items that would be great to remember your trip by. Leave all but one credit card at home for emergencies, and bring enough traveler's checks to cover meals, entertainment, transportation, etc.