Okay I feel obliged to warn you there may be a trigger warning in this, as small as it is. So if that may not be a good idea for you to read, please don't. it wont feature much more in the story. But otherwise, enjoy.
Sirius POV
I was walking towards my next class when I sensed that a spell was coming towards me. I could sense that there was someone nervous behind me and I dodged the spell. Having vampiric senses came in handy.
'Come on Potter, you'll have to do better than that.' I laughed. He grumbled as he pushed past me. I was still laughing but stopped when I noticed Remus was in tow with other Gryffindors. My vampire growled. Remus is ours! Not his.
'Shove off back to your snake cave Black.' He retorted.
I was angry. So angry that I don't know what came over me. I could see nothing but red. Oh no. I know what's going to happen. I focused my attention onto Remus and a malicious smile overtook my face.
'Well, well, well Look at this. Potter has a new lackey. Where'd you find this one? Did you pay this one as well? Or is he just in it to be your new slave? Needed someone else to tell you how utterly stupid you are?' I smirked as he continued to get angrier.
I didn't notice Remus' face drop, or his look of hurt. I wasn't bothered. I just wanted to hurt Potter. Stop it. Stop it now. Look at him. Look at our mate.
My vampire was screaming at me. I chanced a look at Remus' sweet face to see it contorted with tears. That stopped me mid rant. My Remus was crying. I so desperately wanted to reach out and hold him. To wipe away the tears. The tears that you caused!
An overwhelming sense of guilt and shame washed over me. There was my Remus. Small, sweet Remus. With tears in his beautiful eyes. I could have kicked myself.
Potter and his cronies left, leading Remus with them. I didn't go to my lesson after that. I went up to the owlery and locked myself in there. As I sunk slowly to the stone cold floor, I felt my nails elongate into the long talons I got with my inheritance. I slowly dragged my nails across the pale skin of my arm. I dragged them harder and smiled as I saw the red blood flowing down my arm. The pain did not matter. No I couldn't feel that. Seeing my blood and knowing I had hurt myself, physically, even if I couldn't feel it, made my feelings of guilt lessen. I had been stupid. Remus will never forgive me. At least, he shouldn't.
The last thought I had before I fell asleep was that he deserved so much better for his mate than me. My locking spell on the door fell as I fell asleep and my skin knitted back together, leaving no trace of what I had done.