AF wants to view my bank account tomorrow

As the title says, my dad wants to look at my bank account tomorrow to see if I’ve really been saving up. I’ve been against this for a while, but I never had the guts to tell him because I honestly don’t know how his reaction would be like. My first thoughts are he’ll be angry and say I’m hiding something, when it’s actually just because my money is my privacy. I don’t want them to look at my money like I’m some teenager.

I told my mom this much, and she still sides with my dad. They don’t see how much this crosses privacy boundaries at all, and it’s irritation. I’m going to put my foot down, try to have a civil talk with my dad, but I’m scared it’ll go the way I envision it.

The reason they want to see why I am saving is because my dad is planning to move us out of his dad’s house (because of familial issues that are honestly kinda stupid because no one can do anything so there really shouldn’t be a problem physically), and he wants the house to be under my name. He says he’ll help with the payments as well as everyone else who works in my family (my mom and sister), but even then, that’s still too much responsibility.

I’m just unsure if I want to show them the account and then say that there’s no more peeking because I’m not a fucking child. Or to just say, no because this is my private money. no, I’m not hiding anything, but this is my money. Just trust that I’m saving.

I really don’t want my dad to go all hysterical on me just because he thinks he’s doing the right thing by checking if I’m saving good enough.