This story is borrowed from The Guideposts Christmas Treasury, which is currently out of print.

My husband, Chuck, and my sister, Lee, are partners in a heating company in Chicago. Lee is the buyer, hirer, firer, phone answerer, typist, bookkeeper, office girl and coffee maker. She will bring hot soup and sandwiches to a crew in an icy basement at three o'clock in the morning, but she is Hard-Hearted Hannah when it comes to spending company money.
When she puts "ND" on an expense-account item, or something she thinks is a luxury, her eyes shoot fire - and Chuck, who is usually a very verbal man, and six feet tall, starts to tiptoe around her desk.
One day about a week before Christmas, all the phones in the office seemed to start ringing at once. There were more broken boilers, burned-out fire pots and stuck stack switches than there had ever been before, and the men were working around the clock. I went into the office to help out on the phones, and it was all I could do just to write down the names and addresses of the people without heat. Worst of all, it seemed that everyone who called either had a new baby, an old grandmother or had just got out of the hospital themselves.
One woman called in tears. She lived in the section of Chicago where rioting, looting and burning had taken place a few months earlier. She had been phoning for several hours, one heating company after another, trying in vain to get a serviceman to work in a black neighborhood. I took the order and promised that a man would be there within the hour. Then she asked if she could pay a little money each week for the service call, and I looked at Lee and repeated the question. She nodded, "Okay," and when I told the customer, Mrs. Jenkins, not to worry, she said, "God bless you, miss," and hung up.
Lee turned the call over the Chuck, as all of the other men were out. "Bump that other call I gave you; they only have a noisy burner. This is a no-heat. Better get right on it." Chuck left and was gone for several hours.
When he came back, he told Lee, "Forget the billing on that one."
She looked at him. "Since when are we in the charity business?"
Then Chuck told us that Mrs. Jenkins was a widow with seven little children. Her house was clean and bare with very few furnishings. The children were thin and hungry-eyed, wearing worn and much patched clothes. After Chuck had the heat going, one of the smaller boys had shyly come over to watch him pick up his tools, and Chuck had patted him on the head and asked, "What did you tell Santa Claus you wanted for Christmas?"
The child looked him right in the eye and answered, "Ain't no more Santa Claus. Mama say he die, no use to ask him for any toys, cause he is dead, and we ain't gonna get none anyways."
Lee never said a word, but brusquely handed Chuck another call and told him to get going. We worked, all three of us, most of the night. The next morning Lee called in to tell us that she hadn't heard her alarm and would be in late. Chuck seemed strangely happy to hear this and asked one of the men to watch the phones for a while, then hustled me into my coat. "Can't spend a dime with that woman looking over my shoulder," he grumbled.
When we pulled up in front of a large toy store, I knew what he was up to. He hummed and whistled while he loaded the shopping cart with dolls, games, trucks and space ships. Then we headed to the candy store for filled stockings, striped red-and-white peppermint canes and marzipan figures of pigs, soldiers and ballerinas. We drove through thick snowflakes, bumper to bumper, all the way to the West Side, unloaded the piles of presents and rand Mrs. Jenkins' doorbell.
In we trotted, behind the whooping children, to find a red-cheeked Lee pinning a Christmas Star of Bethlehem on the top of a fragrant pine tree. Nearby was Mrs. Jenkins, smiling through her tears, as the carefully unpacked a Nativity scene and reverently placed the figures of the holy family in the middle of her dining-room table.
"Well, don't just stand there - get busy?" said Lee, tossing a box of tinsel to my open-mouthed husband. "What took you so long?"