We're at the stage where B.Rube and I can spell out words in a sentence and still not have the girls know what we're talking about.
Our conversation just now:
(you might wonder why we have to spell out the word shower... sometimes, just once in a while, it is nice to be able to take a quick shower without making it an entire family affair. We have to sneak off in order to do that. Otherwise it becomes a half-day event.)
J.Rube: Oh, did you just have a s-h-o-w-e-r?
B.Rube: No, I just had a s-h-i-t.