The following does not show young Ethel at her best, but it also does not show her at her worst.
"D'you know, Jim," she said, "that two-year-old babies can marry on Jupiter?"
"Don't talk bosh, Ethel!"
"But they can. It's this way. A year on Jupiter is eleven years and ten months of our time, so the two-year-old babies are grown up. Ee—you didn't know that!"
A runaway match on Jupiter the bride being under age
Jim said nothing. But when young Ethel exploited her astronomy with Bob, she found her overmatch. This is precisely what was said by them—
Bob: "One can hear your voice ten miles off, Ethel."
Y. E.: "Make it nine, Bob?"
Bob: "Why?"