AITA for locking my dad's girlfriend outside

A few weeks ago, my Dad had left me and his homophobic girlfriend home alone as he went out on a work trip. Even though I am used to spending weeks alone, I am not used to spending it with her. They have been dating for two months now and ever since she found out I was gay, she has been doing little 'tests' on me to see if I was telling the truth. She keeps wearing more and more revealing clothes around me, like tight pants and shirts that reveal her tits, to see if I would get an erection. She would also bend down right in front of me and put her ass almost against me to go grab something she 'accidentally' dropped, and it's making me more and more uncomfortable. She always makes subtle glances at my dih just to see if it is erect and I'm getting angry. Of course I confronted her multiple times but she just denied it.

By two weeks ago I was done. When she went out to go get the mail. I grabbed her purse and her phone and put them outside, locking the door and taking her copy of the house key. At first it was a joke but by the time she came back, I meant it. Over time she tried many times to persuade me to letting her in, but I kept the door locked. She eventually got a hotel and called my dad but there was nothing he could do. I kept the door locked until he came back after two weeks, except when I left for work witch I locked the door on my way out. Now that my dad is home, we are all back under the same roof but I haven't gotten in much trouble. I am grounded but haven't spoke to my dad's girlfriend since and my dad barely talks to me. Should I stand my ground or fold and say sorry.