20-year-old daughter refuses to let family use her lakehouse after stepmom asks to go there on vacation, then demands the kids sleep in tents outside: ‘You just view me as a house key’

My husband's parents, for example, keep inviting the kids for a family getaway, even though every time we've all been on one has been a complete disaster. The most recent one was last July; my husband and I opted out because we could already tell the outcome, and the rest of the kids have not spoken to each other ever since because of some petty drama that took place on day one.

Some families are simply not built for that.

The question is, should the couple in this story agree to give the keys to the lakehouse so that the family can use it for their vacation? Or should they refuse this obvious excuse for family bonding simply so that the family can have a discounted trip to a cozy lakehouse they have no business being at?