[hrm... a soft spot for the kid, that much is clear]
It's a bit complicated to explain. [No sense upsetting the kid needlessly, so he says,] If I do have them, maybe I'll get to meet them someday. I'd like to.
[In reality, he has no idea if he has any - and knows he's likely never going to meet them; and if he does, he'll never know it's them and they'll never know it's him.]