"Look, this summer, I've seen some amazing things, but nothing as amazing as you and your sister. I don't know if it's dumb luck or yin and yang, or whatever, but when you two work together, there's like nothing you two can't accomplish. You just need to make up, and team up, and save the universe."
Like, to be honest, just because I know myself, I'm sure that my own "trust no one ever" philosophy will rub off on any children of either gender I may have. But I'm all for teaching respect too, and hopefully eventually creating a world where distrust doesn't need to be everyone's default.