I don't think it's that at all. She's not vacuous, and the explanations are probably not needlessly complex.
She doesn't care (to the extent that the husband does). She has other interests and areas where she is the expert. I'd experience the same thing with my wife. I would start talking about something I'm working on, and she would follow for a while. But after a certain amount of time or level of technical depth, she would lose interest. Not because she's stupid, but that I had passed the point of her interest.
At some level, our work is just plain boring to other people.
She doesn't care (to the extent that the husband does). She has other interests and areas where she is the expert. I'd experience the same thing with my wife. I would start talking about something I'm working on, and she would follow for a while. But after a certain amount of time or level of technical depth, she would lose interest. Not because she's stupid, but that I had passed the point of her interest.
At some level, our work is just plain boring to other people.