Adam listened attentively. Even without being so drawn to her he would have been curious. Fascinated, in fact. If the last year and change had taught him anything it was that knowledge was always valuable and a lack there of could have extremely dire consequences.
A lack of free will sounded bad to him, but part of that could have been all the years Ethan had preached about destiny and fate to him. Adam had never bought in to such talk, which only served to make it aggravate him more. He hadn't wanted to be like Ethan when he thought the man was his father, and he certainly had no desire to be like his biological father. He fully believed he could make his own path, assuming life allowed him to survive long enough to do so. "Sometimes I think 'destiny' is just another way of someone else trying to impose rules." he remarked quietly. Adam smiled a little when she said he was her first love, leaning in for a quick kiss. In his mind it made what they had all the more special.
When it came his turn to share he tilted his head, trying to think of how best to explain it. "It's more dangerous than I ever could have realized back when my friends and I first discovered we were witches." he said honestly, his demeanor turning more serious for the moment. "Our parents never told us anything. Not what we were, not about what happened when they were our age, the real reason half our parents were dead. All we did know was that we had to hide and pretend to be normal around everyone else. I hate that I have to hide that I was born a witch just because there are groups of people who would kill me purely because of that fact. Who have tried to kill me and my friends. Though it's worse for me now, now that I know the truth about who I am."
Adam pulled away a little so he could hold out his right hand, showing her the brand on his palm, the mark of the Balcoin bloodline. "It's a parting gift from my real father that appeared after he died. Well, after my half sister and I had to kill him." There was little emotion in his voice as he explained. "Apparently the Balcoin line is evil. Maybe even the root of dark magic and tainted by the devil's blood, or so some say. My father, John Blackwell, wanted to create a pure Balcoin Circle; six witches, all with dark magic, bound together. So he manipulated the Circle before mine, as he did with two other Circles of witches, making it so my friends and I would all be born around the same time. And then he let the witch hunters kill half our parents so that we would be vulnerable. And it worked. He lied and manipulated us, and we didn't realize what was happening until it was almost too late. If my sister and I hadn't turned his power against him he would have wiped out every single witch that didn't share our bloodline."
"That's the darkness you sense, Castiel. That's what I'm descended from." Adam had looked away from her by this point, slightly ashamed. "It's probably more than you wanted to know but you deserve to know. I don't want to hide anything from you." Especially since there was a chance his father was wrapped up in the project as well.