Leto would be like "Go show off! Consider it a challenge. Try to out do how well you did last time :D" and then send her a fancy bottle of olive oil as a thank you. And Leto would probably downplay the fact it's for children, and stress the money goes toward education.
Haha, yes. Leto tries very hard to avoid Hera. Like, on a different island if it is possible. She also tries to avoid Zeus, nothing bad to say about him, just, a little distance. She'll gush about Artemis and Apollo forever!