Secrets don't last

Who am I?

I was in being led through the woods, to a clearing in the woods. I realised with a jolt, that this was the clearing that I saw her weeping in. She picked one of the knives hanging from her waist, and cut her hand, she then held it, so that the blood hit the ground. A hole then opened up, where the blood hit. She then jumped in and vanished. The reckless being that I am, I jumped in as well. When I came out, it flung me up in the air and Was only just able to catch myself before I fell flat on my face.
"Hi my name Is Martha, this is my brother Harvey and my parents, Noah and Jashé." She said eyeing me up and and down, as if she was downloading data on me. "So, when did you first turn?" Martha asked with a sheepish smile on her face.
"Turn into what exactly?" I asked in reply.
"A werewolf, obviously!" What was I thinking. Of course I was turning into a werewolf. Full moon, hairy body, sharp teeth. It all makes sense now.
"Last month, why?" I said, with a slight hint of subduction in my tone. Everyone gaped.
"Only last month, how did you change without the full moon might I ask?" Martha's looked around to make sure she wasn't the only one surprised at my statement.
"I dunno, instinct I guess. I really should get going to school. Aww great, if I go now, isolation for the month, if I go back home, I face my step-dad. And if I stay away from both, I face my mum. Worse than both put together. What shall I do?" I asked desperately.
"Well you could stay here, and we could think up a plan of action together?" This was Harvey. Harvey was short, and had horrid hair, it wasn't messy enough. That was the only way to describe him really.
"Yeah! I'd like that." I said, and ran over to the sofa. Front flipped, and landed on my back. I then reached behind me, stole Harvey's Coke, and started drinking.