How can I believe you? [Sirius Black Love Story {Ch. 1}]

Sirius and James actually started to growl a little bit. I couldn't blame them. It was the Slytherin Crew, we refer to them as the Slime-erin crew but that's just us.
"Chill guys, don't start anything, they're not worth it." Lily started placating us, and she had a point, why waste energy on slime! Just as I was about to agree with her, stupid Lucius Malfoy opened his big fat toad mouth.
"Well, well, well. If it isn't the mangy dogs of society. The mudblood, the half-breeds, and the blood-traitors." His lip curled into a sneer. They all laughed along with him. I was ready to rip their heads off. And there he was in the middle of it all, my cousin, Johnathan Markov.
"Johnny wohnny kins! I don't think mummy-kins would be too happy to know that you're hanging out with such hooligans and riff-raff. I think I'll just have to fill her in at the next family party. She wouldn't want her little boy butter buns to get fleas or something, now would she?" I gave him my 'i'm an angel' face. His face was redder than his hair! I heard the slime-erin crew giggling among themselves. You would think to remember to tell them my most dreaded nickname...but no...he's too stupid. Then I heard Sirius laughing his arse off at the names.
"...Little...boy...BUTTER BUNS!! That's...a....CLASSIC! Oh..my sides...James...remind me to use that one later! *hysterical laughter*"
I just smirked at him, and then Reggy opened his mouth.
"That was a low blow Markov, at least HE's not a blood traitor." I laughed, loudly in Regalus' face.
"You haven't told them have you?"
"Shut up, JAZZY-ROSE!"
"Well when you put it that way butter-buns, I guess I won't tell them that you lied to your parents about who your friends are, what house you're in, and you complete lack of respect for muggles. Oops..." I looked as innocent as I could without peein my pants from laughing so hard.
If looks could kill, I would have been so dead, there wouldn't have been anything left of me, just dust. Butter buns was pretty mad at me, but I didn't really care. He couldn't touch me without having to explain to his parents, and exposing his lies. Thankfully he was smart enough to realize this. Not only that, but his friends couldn't either, not unless they wanted to lose their key to the kitchen and the homework answers. So I laughed my way back over to James, Sirius, Lily, and Peter, who were just staring at me with their jaws somewhere down around their knees. Seren and Remus were laughing their little butts off. Slowly James and Sirius joined them, and Peter joined in nervously. Lily looked like she was going to kill up until we heard little Snivellus shout something QUITE inappropriate.
"Shut your bloody mouth Mudblood, it makes you look like a bloody trout! But then again Mudbloods just look like that don't they!" This earned quite a few laughs from his buddies. From the way he treated her, you never would have guessed he loved her, but he did. Lily's eyes began to water, and the next thing I saw was her red hair darting past me. I thought she was running to the nearest bathroom. BOY WAS I WRONG! No she was running over to punch Snivellus in the face, giving him a black eye AND a bloody nose! James had started after her, but thinking she was gonna be crying we held him back. Once we saw what she did, we all went running to her aid.
Some would call it a fist-fight, and numbers wise, an unfair one. They outnumbered us about 2-1, but they're such wossy babies, it was nothing. We all walked away without maybe a bruise or two...them...not so much. We beat the living crap out of them.
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FAST FORWARD TO SEPTEMBER 1ST (DINNER @ HOGWARTS)

"I only have these words to say Blip Blip Bleep!" At that all the food appeared on the table. All of us dug in, wanting nothing more than food. Me, James, Sirius, and Seren were having a contest to see who could eat more food. So far it was a tie between me and Sirius. Then I managed in one more piece of roast beef than him before the desserts appeared. When it comes to dessert I am a bottomless pit, no matter how much I have eaten before. I ate 6 Pumpkin Pasty's, 17 Chocolate Frogs, and 3 Chocolate Frog Sundaes. Sirius ate 7 Pumpkin Pasty's, 18 Chocolate Frogs, and 1 Chocolate Frog Sundaes. We tied...the tie-breaker? That was up to James seeing as he came in 3rd. Seren had given up after watching me eat my 16th chocolate frog.
"Well James...what's the tie-breaker?"
"I don't know...I'm thinking." He scrunched up his face like he always does when he's pretending to think. Which meant he already had something in mind.
"James I know you already have a tie-breaker picked out. You've got you're 'i'm pretending to think' face on. So what is it?"
James looked at Sirius, and then at me, and then back at Sirius.
"Padfoot old friend...I think you just might kill me for this one. Whoever can get me a date with Lily wins. You have until dinner next monday." I laughed loudly.
"So Padfoot, how does it feel to lose an eating contest to a girl?"
"You're gonna be eating those words, Tufts!"
"Wouldn't that make me the winner? Because then I would have eaten more than you." Sirius looked like he was going to kill me.
"Prefects, please lead the 1st years to the commonrooms. And everyone else...go to bed!" Remus andSeren stood up, leading the 1st years to the Gryffindor common room. The rest of us followed suit. Lily walked up near Seren, hoping to get away from James, he just followed her. Peter disappeared off somewhere. That left me and Sirius still sitting at the table. We watied until we were the last few people to go shuffling out. We entered the corridor, and Sirius pulled out James' invisibilty cloak.
"PADFOOT! What are you doing with that?" I hissed, sounding remarkably like a cat.
"I'm going to check that the path is clear. We always do this at the beginning of the year, as we're bringing him down there. It almost cost you your life last time!" I knew he was right, I rembered it pretty clearly. But I didn't even have time to have the flashback before he was wrapping himself in the cloak.
"HEY! Wait, I'm going with you!" I heard him sigh before opening the cloak up so I could join him.
We walked along the corridors silently with map held out in front of us. I was still really mad at them for putting Peter on it and not me, even though I helped out with the map WAY more than he did. But I had gotten over it for the most part.
Then we reached the statue that led to the grounds. Swiftly we slipped into it, and the slid our way across the grounds towards the Whomping Willow. Before he could even say anything, I had morphed into my animagus form, a lynx...hence the name Tufts. I slid forward on silent paws to still the tree. Sirius entered the tunnel, and I followed close behind. We found no barrier in the tunnel. We came out the other side quite safe. We lit a few lamps just so we could see.
"Looks good! Nobody broke any windows this time...that's good. Stupid kids with their rocks."
"Yea...hey Sirius do those windows open? I think I might just be in too many layers but...its hot in here!"
"Yea hold on." While Sirius wrestled with the windows I stripped down to my cami. I was still a little warm, and then I realized Sirius had stripped a few layers too. Like me he had taken off the cloak and sweater vest and instead of wrestling with the window, was wrestling with his tie. I laughed at him, and he just pouted at me.
"No luck with the window?"
"No...not much more luck with my tie...help me?" He flashed his prize-winning smile at me and I laughed again. I walked over to him and started to undo his tie. That's when he wrapped his arms around my waist. I stopped dead, my cheeks turning as red as Butter Buns hair. He realized I had stopped and looked at me, completely frozen in time.
"Chill Tufts, I just don't want you tieing me up with my tie and then taking off." I laughed at this and continued to undo his tie. Something strange came over me as I watched him take his tie off, and then his shirt, leaving him in a wife-beater. That's when I realized Sirius was really good-looking and Quidditch hadn't hurt either. He was ripped, it was obvious to me that he worked out.
"Tufts, could you give me a hand moving the bed, I don't want a repeat of last time." I remembered that too. Moony had almost been able to get out by climbing on top of it and using it as a trampoline to launch himself out the window. We moved it the bed into the corner where the windows were.
"There...think that'll...do...?" Sirius had stripped off his wife beater, and I could see his perfectly defined six-pack. My hear dopped to my stomach, joining the butterflies that were already there. I swear my heart skipped at least 3 beats.
"Tufts you okay? Sorry...the bed's heavy and its hot in....here." I think it was at this point that he was really looking at me. I was in my school uniform skirt in red cami with a black bra, and my knee-highs and my favorite knee-high black leather boots.
We stood there staring at each other in awe of how in shape the other was. Before I could even react Sirius was kissing me...and even weirder....I was kissing back. My best friend and I were making out in a shack. Bloody. Hell.