Heart
Arthur's birthday was the same week as Valentine's day.
It was their first February as a married couple, and Molly wanted to do something special for her new husband. As usual, her mother-in-law had other plans.
"We wanted to do a big party with the whole family," Cedrella complained, sipping tea at the kitchen table. "My baby's turning twenty. It's a rather important date, don't you agree?"
"Of course, Cedr-"
"You'll understand better when you have children, of course," the older witch went on. "And this may be a good way to bring the family together. My sisters have agreed to come, and my nieces and nephews. And Charlton will be in town. Arthur will be so happy to have his big brother attend his birthday, and do you have any idea how hard it is to get the entire family together? Even Septimus' brother is coming!"
Molly sighed, sensing a losing battle. "Fine. We'll do a party. I'm assuming you want to host it?"
"Well, your house may be newer, dear, but you'll never fit more than a handful of people in here."
The party was a success, and it certainly got Cedrella off her back, but Molly was still upset that she wasn't able to celebrate the birthday alone with Arthur. So with Valentine's day around the corner, she took decided to plan a night alone with him.
He had to work, of course. He loved his work, so it wasn't too bad, but Molly usually hated to be apart from him for so long. Today it was a blessing. It gave her the time she needed to peruse muggle shops for the perfect gift (some muggle contraption that she couldn't work out), bake a carrot cake (Arthur's favorite), and hang the heart-shaped balloons, red and white streamers, and the clock Arthur's father had made for them ("With plenty of room to add more hands," Cedrella had hinted).
She was just in the middle of putting the finishing touches on the decorations when her owl, Hester, flew in and dropped a small yellow box by her feet. The lid popped off the minute it hit the floor, and out few no less than a hundred fluttering paper hearts, every one featuring a picture of the young couple or one of their love letters to each other.
Arthur pushed his way through the crowd of hearts to hand Molly a bouquet of sunflowers as Celestina Warbeck played over the WWN.
They danced until the magic drained from the hearts and they rained down around the couple.