This story is written for Aqua Cahill's "What A Word!" Challenge. My prompt word is 'moonbeam', which I need to use at least three times. Luckily, it ties in nicely with a random idea I had a few days ago.

Petunia Dursley had just had a good day. A very good day. As she walked down the hall to the master bedroom, she mused that days really don't get much better than this. To start, her darling Duddikins had permitted her to kiss him when she dropped him off at school this morning. Now that Dudley was ten, she had expected him to become increasingly difficult about motherly affection. It was pleasing to discover he loved her as much as he ever had. Besides which, the boy had already shot out of the car and ducked into the school by this stage, making the moment with her son even sweeter.

After dropping Dudley at school, Petunia had gone to the supermarket to do the weekly grocery shop. While there, she had run into no less than three other mothers from the school, each of whom had passed on a different new piece of gossip. Petunia adored gossip, and one of the mothers had told her something extra juicy about the happily married Headmaster and one of the mothers from the second grade.

Also, the bananas were on sale and Petunia had bought six bananas for an excellent price.

Once home, Petunia had spent several hours cooking, cleaning and performing all the other duties of a dutiful housewife. And it did cheer her so, doing these things for her husband and her son. Sometimes, being a housewife was very rewarding, and Petunia did love to clean.

Finally, Vernon had come home with a large smile plastered to his larger face. At work, he'd been offered a lucrative new contract, with a new office on the top floor of the building. Vernon was feeling very pleased with himself, and this made Petunia happy – she loved to see her wonderful husband so cheery.

Yes, all in all, a very good day, Petunia thought as she passed through a single moonbeam on her way down the hall. Then she stopped. With a frown, she stepped back into the moonbeam and looked at herself in the mirror that hung about halfway down the hall. And there it was. Petunia gasped in shock.

The red was showing.

Just like that, Petunia's mood was glacial. She stood for a long time, staring at her hair. At the moonlight on the top of her head. At the streaks of red showing through the blonde, highlighted by the moonbeam in which she stood.

She must have made a noise at some point, for Vernon's head appeared round the doorway to their room at the end of the hall. "Petunia, dear," he said with concern. "Is everything alright? I just heard the strangest growling sound…"

Petunia covered her mouth with her hand; she must have let her anger be heard. No help for it, then. She turned to face her husband.

"Vernon, you can see the red in my hair."

Vernon's expression darkened visibly. He looked at Petunia, then at the mirror, then back to Petunia. "Oh," was all he said.

Petunia hastened to reassure him. "I'll go tomorrow and get the dye. First thing, as soon as they're open. It'll be gone by lunchtime."

"Well, good then," Vernon replied. "You'll feel better. I know how you hate to be reminded of her."

Petunia nodded, and her husband disappeared into their bedroom. Petunia took one last look into the mirror and closed her eyes.

Tomorrow, she repeated to herself. Then she went to bed.

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The next morning, Petunia was standing outside the supermarket when the doors opened. She rushed in, bought the blonde hair dye, and raced home. She doused her head twice with the dye before she was satisfied.

And that night, when she stood in the same moonbeam and looked in the mirror, there wasn't a single sign that she'd ever been related to Lily Potter.