如何翻译这个玩笑？

横槊赋诗

Once upon a time in the unknown past, at a dinner party in Texas, a man from South America was telling about his country and himself, concluding with "And I have a sympathetic wife but unfortunately, no children. My wife, she is unbearable."

Those who were listening greeted his statement with puzzled glances, so he tried to explain: "My wife, she is inconceivable." Noticing from the bewildered looks of the guests that this didn't clarify the matter, he finally explained with a triumphant smile: "I mean, my wife, she is impregnable."

笑点解析：bear生育，conceive怀孕，但unbearable是无法忍受，inconceivable是不能想象。

横槊赋诗

我自己想到的：不参加生产、总是无喜