I'd still probably not have the conversation for fear of embarrassing her and that seems fine?
(Your children will probably be grateful for this.)
This might not be logical, but there you go. Something these things aren't. If you feel strongly that this is so ridiculous that things should change, then let nobody tell you that you are wrong, but I think you'll find that this is a minority viewpoint, and you'll attract few fellow travelers for your quixotic quest.
I've seen both my parents naked and sex was taboo, sure, but genitals in itself (like talking about the size of ones penis for an health issue) were not that much. That situation was not sexual at all and I'm sure your children wouldn't really care (or maybe it's the fact that it was less sacralized in my family). I do not feel traumatized by that and even feel a little insulted by the: > (Your children will probably be grateful for this.)
I'm not saying that one situation is superior to the other one, but I perfectly understand the point of the person you're answering to and feel all those downvotes are a little unfair for a real (and in my pov, valid) opinion.