It would be a little like seeing his little sister in that thing, yes. He'd try very hard not to judge of it was a willing choice to wear on her part, but... At least Kono very rarely fought crime in a bikini.

Hopefully they have enough moral backbone to do the right thing, but...

Based on them trying to punish her, he wouldn't hold his breath.

This sort of thing is never easy. Wish it was.