[He wonders if his answer really matters, would she forgive him if his reason was more 'understanding?' Maybe? He can't predict that. However, he doesn't intend to lie now of all times.]

I'm a prince, raised to be a king since I was young, but everyone knew that I wouldn't ever get that chance normally. So, I thought I'd make my own path to succession, even if it wasn't my own kingdom.

[It's as simple as that, without getting too much into the details. Hans tits his head at her, almost as if he's gauging her reaction, but it's mostly for show.]

Or did you want to hear a different answer, Susato? To make you feel less betrayed by my comments?