Prompt: Every Breath You Take by The Police and mittens.
A/N: I claimed this prompt for hp-drizzle but had to drop it. Because it was already weather related and I really liked the story idea I came up with for it, I'm taking the idea and making it Christmas related and to fit the prompts, obviously.

You catch more flies with honey than with water, as they say, so Auror Harry Potter changed tactics when it came to discovering what Ex-Death Eater Draco Malfoy was up to.

Because he was most certainly up to something—Ex-Death Eater or not. He'd always been up to something. Their first year at Hogwarts as Ron and Hermione both witnessed with him, their sixth year at Hogwarts even though no one believed him, and right then as he came into the Ministry to work every day and went shopping in Diagon Alley as though he no reason to be ashamed—which he most certainly did—he was up to something. And whatever that something was, it was no good.

It was no good when Draco smiled, and he'd been smiling a lot lately. That's what first grabbed Harry's attention. Draco's smile. Smiling was uncharacteristic for him. He snorted, scoffed, or smirked.

Day(s) of Investigation: 12
Location: Malfoy Manor
Time of Day: Early Morning
Notable Changes: Lights all around the Manor.
Subject's Movements: Reading a book by the fire, again. Still haven't caught the title. Later tea with his mother. Looking out the window suspiciously at the bushes.

Then because around day eight Harry began to wonder if what Draco was up to had something to do with it, Harry added:

Weather: Lightly snowing. Any footprints from the night before covered by new snow.

Harry couldn't stay too late in the day because he'd be missed at work. Even though he considered this part of his job, he boss didn't and he'd get another warning about the matter if he was caught again.

Still, even the evilest people took tea with their mothers. Having a normal event free day—or week—meant nothing.

Later while writing up his report for another bit of magical china finding its way into a Muggle's house, Harry considered that the morning might not have been uneventful. Malfoy taking tea with his mother was normal, but that was just what he'd want someone investigating him to think! Harry had no idea what they were discussing. She was Narcissa Malfoy after all. She might have saved Harry's life at one time, but that didn't change her loyalties.

Draco's mother could certainly be part of whatever it was that Draco was up to. Harry needed to find out the title of that book, and he needed to find a way to listen in on their conversations.

Armed with this new knowledge, Harry rushed through his paperwork and finished it in record time. Head Auror Robards even complimented Harry on his renewed enthusiasm for his work as he was putting on his mittens.

Harry smiled and nodded, but itched to get away from the man. He had to get to Malfoy Manor straight away and didn't have time for chit chat.

Investigating someone wasn't exactly isweet/i, but it was a whole lot nicer than randomly stopping them in the halls of the Ministry and asking them threatening questions—as Draco put it. Still, Harry knew he could do more, and since Harry needed to listen in on Draco's private conversations that evening Harry took his investigation a step further and knocked on the door.

Draco answered with his familiar smirking face. 'What do I owe for the pleasure of this visit?'

'What?'

Draco rolled his eyes and sighed. 'What do you want, Potter?'

'Oh, right. I wanted to apologise for embarrassing—'

'Harassing,' Draco corrected.

Harry continued as though Draco hadn't spoken. '—you the other day. I'm sorry. It won't happen again.'

'Good.' Draco moved to close the door, but Harry stopped it with his foot and said, 'Wait! Aren't you going to invite me in?'

This all played out much better in Harry's head.

'Why would I?'

'I'm trying to make amends here, Malfoy.'

Draco glared at him, but before he could say anything else Narcissa came up behind Draco and saved the day:

'Is that Harry? What are you doing, Draco, invite him in.'

Harry grinned at Draco, who rolled his eyes, but then opened the door and made a sweeping gesture with his arms. 'Do come in, Mr Potter. Mother would love to see you.'

'We,' Narcissa corrected, 'would love to see you.' Then she came and gave Harry a quick, tight hug. Harry changed his mind. She was wonderful and absolutely not at all involved in whatever it was that Draco was up to.