Regulus Black was more determined then ever to figure out what Sirius was up to. Sirius came home somewhat late at night and looked as if he'd been hit with a bludger or that a mountain troll had managed to give him a few good knocks. He had a stupid dazed expression on his face and not even Kreacher could shake Sirius out of his stupor. Regulus had seen that expression before. It meant that Sirius had found a new obsession, something he was smug about. And Regulus was more determined then ever to figure out what it was. Regulus knew that whatever it was Sirius was up to, it was below Regulus. He knew he shouldn't care about his brother's activities, but he just couldn't help himself.

So the next day, Regulus followed his brother. Regulus was a seeker, being stealthy and sly were second only to breathing to him. So he was quite sure that Sirius had no idea that he was being followed. Regulus followed Sirius to an auto-shop and saw him messing about with a muggle vehicle. So this is what Sirius has been up to, playing around with silly muggle inventions! With disdain, Regulus noted that Sirius did all of this without any magic. He watched as Sirius took the better part of the day, cleaning and polishing a piece of metal. And he looked proud of his accomplishment when the useless piece of metal gleamed. It would have taken Sirius less then a minute to do that with a cleaning spell. He should be proud of that not the borderline barbaric methods muggle were forced to resort to.

Worst of all, Sirius seemed to be friends with the muggles around the shop. Regulus was quite sure that he would vomit up the eggs Kreacher had fixed him for breakfast when he saw one of the muggle men put his hand upon Sirius's shoulder in a fatherly fashion. Sirius looked back at the man with respect in his eyes. Sirius didn't respect anyone, Regulus knew that, but here he was respecting a mere muggle. Muggles, the subservient filth of the earth.

This was how Sirius decided to spend his time instead of with his brother? Sirius was a lost cause and with that in mind, Regulus returned home to Grimmauld Place where people were worthy of him. And try as he may to forget his muggle loving brother, Regulus couldn't erase the look on Sirius's face when he looked at the man. Sirius had once looked at Regulus like that, with appreciation and affection, but it had been years ago.

Sirius was nothing if not an expert on sneaking around and to be specific, sneaking without being caught. He knew all the tricks which was why it only took him half a block of walking to realize his brother was trailing him. Sirius knew that Regulus wouldn't have dropped their little argument so easily. If Regulus was going to follow him, Sirius was going to give him something worth looking at.

Sirius thought of the most meticulous work he could do on his motorcycle and made it a point to not even use a drop of magic. He knew that acting like a muggle would disgust Regulus the most, disgust his family the most. Sirius was overly friendly to all the other men that worked in the shop, so Regulus could see that wizards and muggles could relate. Sirius couldn't wait until he went over to the cafe to see Evelyn, the look on Regulus's face...

But the thought stopped short. Why should he share Evelyn with his bratty brother? She was like a secret to Sirius and surely the moment he told, it would all get spoiled. The night before, Sirius must have at least fifteen times grabbed a parchment to send a letter to James or Remus or even Peter to tell them what he has been up to only to stop with the quill dripping ink on to the blank page. He didn't want to tell. It was so delicate and he was almost sure that his friends' opinions would ruin it. He could hear their reactions. James would say: "Well done, mate!" with a few cheeky comments, Peter would be highly impressed: "A muggle? She's a muggle, Sirius?" with his watery eyes wide, Remus would look concerned: "You should be careful considering your family. And if you're only interested in her to annoy your parents...that's not fair to her, Sirius."

Sirius's thoughts shifted again. Was that the reason he was interested? No, he convinced himself. No he thought, I'm interested because she's tough, she doesn't get scared off easy, she can take a joke, because she smells nice and because she is just so different, she belongs to another universe. Yes, Sirius thought, that was why he was interested and he snuck a look towards the cafe and tried to look for her surreptitiously so not to rouse Regulus's attention. He thought he saw her with her hair stuck up in a rebellious way but he couldn't be sure.

And he would never be sure, at least not today, he thought with a sigh. Today was about calling out Regulus on his crap stalking skills. He gave Regulus about a five minute head start while he finished up his day's work on his motorcycle and by using an alleyway, he caught up to Regulus in no time. Sirius snuck up behind Regulus and put his arm around his shoulders:

"Fancy seeing you here, Reg. Better be careful that none of your friends see you, baby bro. Or else they won't let you join their little club." Sirius sneered.

Regulus jumped in surprise and looked angry at being caught.

"How did you find me?"

Sirius let out a short laugh. "You're certainly not my first stalker. In case you haven't noticed, girls love me. I have all kinds of stalkers at hogwarts."

Regulus unfortunately did know all about Sirius's stalkers and hated being compared to those ditzes.

"I wasn't stalking you."

"No, just following me around, trying and failing to sneak after me."

"I didn't fail! I was after you all day. It took you this long to realize."

Sirius laughed again: "I knew all along. I happen to be an expert on sneaking and not being found, something that apparently doesn't run in the family."

Regulus, annoyed at being caught, walked faster to get away from his brother. Sirius grabbed his shoulder suddenly and pulled him back. Regulus saw muggle cars zooming by where his foot had been moments before.

"Look you idiot," Sirius said. "You stop when the cars go."

Regulus was getting increasingly annoyed, especially now that he was in his brother's debt.

"Stupid muggles," Regulus muttered.

"Stupid? Just because you don't have any common sense..."

"I don't waste my time with muggle nonsense, unlike you." Regulus hissed.

There was a gap in the traffic and Regulus crossed the street. Sirius followed.

"And yet you waste your entire day watching me, what was it? 'Wasting my time with muggle nonsense?'"

"I was trying to see what you were up to."

Sirius shrugged. "Now you know, feel better?"

"Better?" Regulus spat. "How could I feel better knowing my own flesh and blood prefers the muggle world?"

Sirius groaned. "You sound just like mum."

"I should tell mum what you're doing!"

"And what's she going to do? Don't worry Reg, she already thinks I'm a blood-traitor and you're still the favorite..."

Regulus and Sirius had reached their house and Regulus bounded up the steps. As he reached the door, he turned to face Sirius and sneered:

"Alright then, if not mum maybe someone else...Perhaps a cousin, like Bellatrix."

Sirius felt like his brother had slapped him. Telling Bellatrix anything about muggles was as good as asking politely to be tortured. If Bellatrix found out about his motorbike, she'd be angry but if she was to find out about Evelyn...

Sirius pushed Regulus against the door and pinned Regulus's throat with his hand.

"Don't you dare." Sirius said, his voice deadly.

Regulus was surprised by Sirius's reaction but had a retort.

"Why Sirius?" He said his voice sounding weak from the strain. "Have something to hide?"

Sirius let go because Regulus was turning purple.

"No, of course not." Sirius said cooly, moving his hair out of his face. "You already saw my secret."

Sirius walked into the house, trying to get his breathing back to normal. Regulus was too dense to realize that Sirius's reaction was way too dramatic and was caused by something other then a bike. Yeah, Sirius thought, he'll just think I feel strongly about my bike, we'll be fine.

But the damage was already done. Regulus wasn't a fool. He knew that there was more to Sirius then what he had seen.

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