Samuel had other things that he needed to focus and because of that he hadn't been bothering to text J back as much as he had in the beginning. He found out rather quickly this was problematic because the less often he texted the other, the more questions the other would ask by the time that he came back to replying to him.
He still hadn't figured out why the other was interested in knowing so much about him. He had tried to dig for a deeper answering than the fact that they were family, but J didn't give him any other answer except for that followed by asking whether it was a bad thing that he wanted to know so much about someone who was family but that he never got a chance to interact with?
Samuel's initial response would've been to say no, but after he and Lena had talked about family that one time, he wasn't sure no was the right answer since he really didn't know that much about this other person beyond what he had been willing to tell him.