It catches off-guard, but in truth, nothing about what Inigo says is surprising. It's an important matter to him, always has been - and must be more with his mother having come here. Tidus doesn't speak, even once Inigo done - all he does is squeeze their joined hands, and then presses the submit button for Inigo.

Tidus hates knowing the reply they'll get - the same they always get - but after the joking around...

Nothing ever changes.