I can definitely agree with you there. Separated or not, hearing about the operation simply "in passing" doesn't feel right.
I have to admit, though, something about your H's actions have struck a chord. In the past few days, you've written about three occasions where he has mentioned something "in passing" and my feeling is that he wants you to ask him or probe further about them: (1) the operation; (2) his going away for a night currently; and (3) his going away later (I think it was November).
I could be wrong, and maybe I'm just mindreading your H now, but that was my first thought on each of those occasions.
