LW1:  She doesn't want to fund your traditional family vacation.  It's not just "legally in her name."  It's her house.  She bought it.  Maybe she rents it out during the season for income, and having you all there for free would put her in a financial hole regarding upkeep.  Pay your portion, bring some groceries, and leave after 3 nights.  If you rented a hotel room, you would still have to pay for your meals or food.  No one owes you a free week just because you have memories.