AITAH for not wanting my aunt to have a key to our house?

AITAH for not wanting my aunt to have a key to our house? (This is a repost since the other got taken down).

Hi Reddit, I (19F) honestly don’t know if I’m thinking clearly anymore because I’ve been so overwhelmed, so I really need an outside perspective.

There’s a LOT of history here, but to keep it simple:
My dad’s sister (my aunt) has caused so much chaos in my family over the years. She’s lied about us, manipulated relatives, turned people against us, created fights out of nowhere, and constantly made me, my sister, and my mom feel small or disrespected. She even used my sister when she was a kid to feed into her drama. She’s the kind of person who loves control and attention, and everything has to revolve around her.

Even recently she’s been saying and doing things that just… drain me emotionally. I’ve tried distancing myself because every interaction with her leaves me stressed or angry. But my dad never wants to talk about the past or acknowledge any of it, because “she’s his sister,” and he immediately gets dismissive whenever I bring up my feelings.

Now here’s where everything is exploding for me:
We’re putting a new gate on our property, and my dad wants to give my aunt a key. As in, access to our yard and basically our house whenever she wants.

The idea of her having that kind of access makes my stomach drop. This is MY home. MY safe space. And it’s the one place where I’m not forced to deal with her energy. My mom, my sister, and I all said we don’t feel comfortable with this at all, but my dad keeps acting like we’re overreacting or being dramatic.

I ended up crying yesterday because it’s not even just about the key. It’s all the years of him dismissing how she treated us. All the times he told me to “let it go” or acted like I was the problem for reacting to her behavior. It feels like everything I’ve held in just piled up, and now this key situation is the breaking point.

He doesn’t understand why this is such a big deal to me, but all I can think is: why should someone who has done nothing but disrespect us get a key to our home? Why should she have access to my safe space? Why am I the one being treated like the unreasonable one?

So… AITAH? Or is it normal to not want someone who’s caused so much hurt and tension to literally have the ability to walk into my yard/house anytime?

I’m honestly so tired and emotional right now. Any perspective would help.