I asked my neighbor three times to stop throwing tea bags onto my balcony. He ignored me—until something changed.

Let me tell you what eleven years in the same apartment building teaches you.

Eleven years is enough time to learn which stair creaks in cold weather, which neighbors argue every Sunday morning, who gets groceries delivered on Thursdays, and which resident practices an instrument badly enough that you can track their complete lack of improvement.

It is long enough to become part of the building itself.

The person people trust with spare keys.

The neighbor who signs for packages.

The one who knows where maintenance forms are kept because she has actually read them.

That person was me.

Margaret Collier.

Apartment 3B.

Eleven years.

In all that time, I had never caused a complaint, started a feud, or given management any reason to remember my name except when rent was due.

I had watched neighbors’ pets.

Accepted packages.

Helped new tenants find the recycling bins.

I was reasonable.

Dependable.

Predictable.

And then a man upstairs decided to find out exactly how much “reasonable” I would tolerate.

His name was Daniel Hartley.

He moved into apartment 4B fourteen months earlier.

At first, he seemed perfectly pleasant.

About forty.

Friendly enough.

The kind of man who carried groceries in reusable bags and filled his apartment with houseplants before he had even finished unpacking.

When we first met, I gave him a card with the building manager’s number, emergency maintenance details, recycling schedule, and quiet-hour rules.

He thanked me sincerely.

I remember thinking:

Good.

This one will be easy.

The tea bags started during his second month.

The first one appeared on my balcony one wet November morning.

Used.

Still damp.

Breakfast tea.

I assumed it was an accident.

Wind.

Carelessness.

Something tossed without thinking.

I picked it up and threw it away.

Then another appeared.

And another.

By December, there had been several.

One morning, I hung two white towels outside.

When I returned, one had a large brown stain across the center.

A soaked tea bag sat in the fold of the fabric.

That was when I finally went upstairs.

Daniel opened the door looking half awake.

When I explained what was happening, he looked genuinely embarrassed.

“Oh no. That was me?”

“It has happened several times.”

He rubbed his face.

“I’m sorry. I flick them over the railing when I’m tired. I don’t even think about it.”

Then he looked horrified when I mentioned the towel.

“I’ll stop. Seriously.”

He sounded sincere.

So sincere, in fact, that I went downstairs feeling slightly guilty for making a fuss.

At seven the next morning, another tea bag landed on my balcony.

I heard it hit the concrete.

Still, I waited.

Three weeks.

People later asked why I didn’t immediately complain again.

Because shared buildings run on social mathematics.

You have to live beside these people for years.

Small arguments can turn hallways into hostile territory.

So I wanted to believe Daniel was simply careless.

Then one January morning, I sat outside with coffee and a book.

A tea bag dropped directly onto the pale cushion of my balcony chair.

I watched it land.

Watched the liquid soak into the fabric.

I waited to see whether the stain would spread.

It did.

That evening, I tried cleaning the cushion cover.

The mark remained.

So I went upstairs again.

This conversation was different.

Daniel opened the door and leaned casually against the frame.

“You’re still throwing tea bags over your balcony,” I said.

He shrugged.

“It’s a tea bag.”

“It stains. I already lost a towel. Now a cushion.”

He looked at me with complete indifference.

“You live below me.”

I stared at him.

“That’s how apartment buildings work,” he added.

Then he smiled.

Not kindly.

“You should be glad it’s only tea.”

“What?”

“I’m just saying. Could be worse.”