What should we do?

I’m going to Australia in March with my friend and her boyfriend we are going to be staying at my Aunt’s house. I asked my aunt if my friend, her boyfriend, and I could stay with her during that time and if not that was fine. She said that she would love to host us while we’re down there and that she’d also love to show us around.

When I told my dad about my trip to Australia he flipped out when I told him I was inviting my friend and her boyfriend instead of just my friend and how it was rude and disrespectful of me even though I asked my aunt if we could all stay with her back in November and that we’d help pay for gas and groceries.

My dad and stepmom both said that I should only stay at my aunt’s for 3 of the 12 days that we’re there and spend the rest of the time in a hostel and to book it in advance. I decided to message my aunt asking if there’s a time limit that she’d want to host us for that way I’d know whether or not to book a hostel. She responds with that there’s no time limit and she has a rooms for all of us at her place. She then continues to say that she took two weeks off work she can spend time with us.

So do you think we’re fine staying at my aunt’s house the entire time or should we listen to my dad and stay at a hostel for the majority of the time?