My water bill suddenly doubled while my children were away, and I couldn’t understand how—until I caught my former mother-in-law running a garden hose from my outdoor faucet straight into her swimming pool.

She laughed when I demanded repayment. What she had forgotten was a secret she’d once told me about that pool—and the HOA was going to be very interested in hearing it.

The house beside mine had been vacant for exactly nine days when Diana bought it.

I remember counting because every morning I secretly hoped someone—anyone—would purchase it before my mother-in-law did.

“I want to live closer to my son,” she announced on moving day. “Harold needs his mother nearby.”

Harold, who was still my husband then, simply shrugged and carried another box inside.

“She’s family,” he said. “It’ll be fine.”

It was anything but fine.

From the beginning, Diana behaved as though the fence separating our properties was merely decorative.

She regularly walked into my kitchen without knocking, opened my refrigerator, and took whatever she wanted.

One morning, she picked up the last carton of eggs.

“You’re almost out,” she said. “You should buy more. We’re family, and I need food too.”

“Diana, those are for the kids’ breakfast.”

She barely looked at me.

“Then get up earlier and make them something else.”

I learned to bite my tongue.

Unfortunately, staying quiet only encouraged her.

She threw her garbage into our bins because she didn’t want to pay for her own trash service.

Tools disappeared into her garage and never returned.

She criticized how I folded clothes, how I raised my children, and how I managed the household.

“You’re not much of a homemaker,” she would say. “Harold works all day, and this is what he comes home to?”

For years, I convinced myself that keeping the peace was worth swallowing my anger.

Back then, Harold and I argued about money constantly.

Our household expenses always seemed higher than they should have been, no matter how carefully I budgeted.

“We’re spending too much,” Harold would say while studying the bills. “Water, electricity—everything keeps going up.”

“I’m watching every dollar,” I insisted. “I don’t understand it either.”

“Maybe you’re just not keeping track properly.”

That accusation hurt more than I admitted.

I started saving receipts.

I wrote down purchases.

I checked meters.

I tracked everything.

And still, our bills never quite made sense.

Eventually, I began wondering whether Diana was right about me.

Maybe I really was careless.

Maybe I really was terrible with money.

It would take years before I discovered the real reason those numbers never added up.

My marriage with Harold didn’t end suddenly.

It cracked little by little until there was nothing left to repair.

When we divorced, I kept the house.

I assumed Diana would eventually move since Harold no longer lived next door.

She didn’t.

When I cautiously mentioned it, she looked offended.

“Why would I move? I like this neighborhood.”

“Harold doesn’t live here anymore, Diana.”

“This is my home now. You don’t get to decide where I live.”

At the time, I thought having my ex-mother-in-law next door was merely annoying.

I had no idea how much she was actually costing me.

So she remained in her house.

I remained in mine.

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