He considered contacting Remus for a brief moment but discarded the idea almost as soon as he had it, Remus was a werewolf after all, and Harry knew that he had difficulty holding down a job in the magical world due to his disability, as such he probably wasn't the best source of information Harry figured. On top of that, Remus had never looked him up in all the years he had spent living at Privet Drive. For someone who had claimed to be so close to his parents to never even make a phone call to check on him was bloody inexcusable. For that matter where had he been all of last year? Sirius was on the run and he had still managed to maintain contact. Where had Remus been? The more Harry thought about it the angrier he got. He could almost excuse Dumbledore for never checking up on him. Almost being the operative word. After all apparation and portkeys were both nearly instantaneous, so if travel time wasn't an issue how long would it have really taken to stop by a house and speak to a kid to make sure he's all right. Still, after all Dumbledore had to be a busy man, what with his multiple positions in both the wizengamut, the ICW and Hogwarts, but what excuse did Remus have? Just that he was a werewolf?
Come to think of it, there were a lot of things about Remus that were extremely fishy. Take the events of third year. First of all, until the incident at the Shrieking Shack the man had never mentioned how close he supposedly was to Harry's father. He had, in fact, barely mentioned him at all. Plus he never told anyone that Sirius was an animagus. At that time, Sirius was thought to be a psychotic mass murderer out to kill Harry, and Remus Lupin never told anyone about the one piece of information that could have explained how Sirius was sneaking into the school. Why?
All he had given was some kind of piss poor excuse that he had not wanted to disappoint Dumbledore. Wasn't Harry's life and safety more important than disappointing Dumbledore? Obviously not to Lupin.
Then the man very conveniently forgot to take his potion at the worst time possible. He was in a school full of children and he forgot to take his Wolfsbane potion. Either he was incredibly stupid, which Harry knew he was not, or there was something more sinister at work. Suppose, just suppose that he had known about Pettigrew all along. Not only known, but suppose he was working with Pettigrew and Voldemort. Pretending that he had forgotten his Wolfsbane had certainly provided the perfect distraction for Pettigrew to escape.
Snape had been there as well. Harry knew Snape had been a Death Eater. As such he should have known that Pettigrew and not Sirius was the traitor. Yet he had kept quiet all this time. Harry thought back to what had happened when Snape had shown up in the Shrieking Shack.
Snape was slightly breathless, but his face was full of suppressed triumph. "You're wondering, perhaps, how I knew you were here?" he said, his eyes glittering. "I've just been to your office, Lupin. You forgot to take your potion tonight, so I took a gobletful along. And very lucky I did... lucky for me, I mean. Lying on your desk was a certain map. One glance at it told me all I needed to know. I saw you running along this passageway and out of sight."**
Had that been true? Had Remus forgotten his Potion? Or had Snape been giving Remus a hint? When Snape told Remus that he forgot to take his potion, had he really been ordering Remus to pretend that he had not taken it?
Harry was appalled. "Could it be true?" he wondered. "Was Remus not what he seemed?" Even if it wasn't and Remus was not a traitor - According to Sirius's story his parents had not trusted anyone else with the knowledge that Pettigrew and not Sirius was the secret keeper. That certainly indicated that not only did they not trust Remus, BUT it also meant that they had clearly not trusted Dumbledore either. If his parents had not seen fit to trust Remus and Dumbledore, why on earth should he? After all they had known the two men far better than he. True, Sirius had explained that they had been wrong not to trust Remus, but could he really believe that? No, he could not afford to. After all, it probably was some sort of a logical fallacy to assume that Remus was innocent just because Pettigrew turned out to be a spy. What, after all, would have stopped Voldemort from having more than one spy? Nothing!
Harry wondered what would have happened that night if he had not stopped Sirius from killing Pettigrew. Would Remus have turned his wand on Sirius at the last moment? Probably! He had been kicking himself for saving Pettigrew as the man had escaped just moments later when Lupin transformed, but now it looked like he had actually saved Sirius from dying at Lupin's hands.
Wait, hadn't Dumbledore sent Sirius to live with Remus at the end of last year? That meant that he couldn't contact Sirius at all. Sirius trusted Remus and that meant that anything told to Sirius would be as good as told to Remus. So that meant he couldn't tell Sirius anything either even if he was talking to him, which in any case Harry was in no mood to do at the current time.