My name is Margaret. I’m seventy-four, and I have hemmed other people’s trousers for fifty-one years. My son Paul is forty-five now, and last Saturday he turned his new house into a party.

There were sixty guests, candles on every table and a name card at every seat. Mine was at a small table by the kitchen door, half hidden behind a swinging door and a stack of clean plates. “You’ll be more comfortable here, Mom,” Paul said, kissing my forehead. “Less noise.” I smiled. I have been smiling at that table for six years.

At nine o’clock Paul stood and tapped his flute with a spoon. “Everything I have,” he said, “I built with my own two hands.” People clapped. His wife Claire clapped too, proud and glowing, and my heart hurt for her a little, because she believed him.

My grandson Theo, who is nine and notices everything, looked at me across the room. I nodded. He picked up the small cedar box I had wrapped that morning, walked between the tables in his little grey waistcoat, and set it down in front of his mother.

“Grandma says it’s for both of you,” he said.

Claire laughed and lifted the lid. Inside lay one thick envelope tied with the blue ribbon I use for hems. She slid out the first sheet, read the top line, and her hand went slowly to her mouth. Paul stopped smiling. He reached for the page, but Claire pulled it away and said, very quietly, “Paul, why is your mother’s name on every one of these payments?”

Every page was a bank statement. Every statement showed the same thing: a payment on the mortgage of their house, made on the first of the month for six years, from an account in the name of Margaret Hale.

Six years ago Paul’s business failed. He lost everything in one spring and was too ashamed to tell Claire, who was expecting their second child that summer. He came to my flat one night and sat at my kitchen table with his head in his hands. He didn’t ask me for a thing. He never does. But I’m his mother, and I heard what he wasn’t saying.

I sold his father’s house, the one I raised him in, and cleared the arrears. Then I took the monthly payments on myself. I took in extra hemming, mended wedding dresses through the night, and moved into a one-room flat above the laundromat. I told Paul I had “downsized.” I asked him not to tell anyone. He told Claire the money came from a bonus, and after a while it became easier to tell everyone he had done it alone.

I didn’t do it to be thanked. I did it because it was my son’s home, and a family should have a roof. But this week the last payment cleared. The final page in Claire’s hands was the bank’s letter, three short lines: paid in full. The house belonged to them, entirely, at last. I wanted to hand it over myself, on the night he was proudest.

Nobody spoke. The candles hissed. Sixty people watched Claire lay the letter on the tablecloth, push back her chair and walk across the room. She didn’t look at Paul. She stopped at my little table by the kitchen door, and she knelt, right there in her emerald dress, and took both my hands.

“Why didn’t you tell me?” she whispered.

“It wasn’t mine to tell,” I said. “It was his.”

Paul was standing exactly where she had left him, red to the collar. “Mom,” he said, and his voice cracked. “I was going to tell her. I swear I was going to.”

“I know, love,” I said. “I’m not angry. I only wanted you to have the house.”

Claire stood up, took the name card from my table, carried it to the head of the room and set it down in the middle seat, the one beside hers. Then she picked up Paul’s card and moved it to the small table by the kitchen door. “You can sit there for a while,” she told him, “and think about the plates.” The whole room laughed, softly, and then they were clapping. Not for Paul.

Paul didn’t argue. He carried two plates of cake to the kitchen door, sat down on a stool beside my chair and put his head on my shoulder, the way he did when he was six. Theo climbed into the seat next to him, very satisfied. “I told you Grandma gives good presents,” he said.

On Sunday Paul came to the flat above the laundromat with the truck. He and Claire had already cleared the spare room at the house, the sunny one with the window seat. I brought my sewing machine, two suitcases and a lemon cake. The best seat in that house is the one by the kitchen door now, and it is mine, because it’s right next to the pie.