Simon had to laugh at that, giving a shake of his head in the negative. "No, not one of those. My... sister, actually. Twin sister." He paused, wondering how much information was too much, but really, Billy had done anything to make him suspicious of simply telling the truth.
"I found out I was adopted a couple years ago, and I headed out about a year ago to see about finding my family." Shoulders shrugged, and he brought a hand to his mouth, chewing on his thumbnail. "Kind of stupid, isn't it? Probably best to leave well enough alone, but... Here I am."