When should I move in?

I have been house sitting for relatives for sometime now. They left to go to punta cana weeks ago. On their itinerary it says they should be home already. I have tried calling several of the hotels to see where they were but no luck. There house is hugh and its all stocked up. I figured I would just move in since I have had several parties in it and I'm about to have another. You don't think they would mind do you? I mean we are all family and I was taught sharing is caring.....