AITA for changing my apartment door code after my sister kept using it for deliveries?

My sister Renee lives twenty minutes away, but most package carriers have trouble finding her building. Last winter she asked whether she could send one birthday present to my apartment. I gave her the lobby instructions and, because I expected to be at work, the code to my front door keypad so she could place the box inside if it arrived before I did.

That worked so well that my apartment gradually became her unofficial shipping address.

At first she asked each time. Then the messages changed from “Would you mind?” to “You may see something for me Thursday.” I usually did not object. I work from home three days a week, and bringing a box inside is not difficult.

The problem was the code. Renee began letting herself in to collect things whenever her schedule allowed. Twice I came out of a video meeting and found her in my kitchen. Once she brought her eight-year-old son, who opened the hall closet looking for a bathroom and knocked over a vacuum attachment. Nothing was damaged, but I felt as if my home had acquired visiting hours I did not control.

I asked her to text and wait for an answer before entering. She agreed.

Last Saturday I woke from a nap to hear cardboard scraping across the floor. Renee had come in for a desk chair she ordered. Her phone showed that she had texted four minutes earlier. She said she assumed I was asleep and did not want to wake me by knocking.

After she left, I changed the door code.

I did not tell her until Monday, when another package arrived. She drove over after work, tried the old code, and called me from the hallway. I was at dinner across town. The box was visible inside my apartment, and it contained supplies she needed for a presentation the next morning.

Renee was furious. She said changing the code without warning turned a boundary issue into a trap. She had relied on an arrangement I allowed for months, and I knew there was still a delivery on the way. She had to wait ninety minutes for me to return.

I said the arrangement had always been conditional on permission to enter, not permanent access. She said if that were true, I should have told her the access had ended before her package was locked behind my door.

She has now redirected everything to a pickup counter and says she will never ask me for a favor involving her mail again. That is technically the outcome I wanted. It also feels harsher than what I wanted.

AITA for changing the code without notice after she ignored the entry rule?