Actually, Kat, what I've said about my S's is that they have only lately taken to be selectively discreet, but most of the time they spill their guts to me when I'd rather they contain their loquacity.
I have just found it odd which particular articles of information they found it important to clam up over. Like, for example, the fact xW and OM were getting M'ed this past weekend -- to my mind it was like, so? They had already said it would be in March. So it was no big deal that required them to be secretive about. Thus it didn't make sense -- but they're kids, so what can one expect.
Then once the day is past -- boom! Spill their guts, they did.
It's hard to tell my two that I'm really not interested in such details without it sounding like I'm blowing them off, which I'm not. I understand and sympathize with them that they have a difficult time compartmentalizing their lives, especially S9. But for my own peace of mind and theirs, I want to minimize her constant attempts to overshadow their time with me.