I see you've added on...

Here's a mostly-LA experience, although of course it could happen anywhere. The fiancee and I met up with a couple we're friends with a few nights ago to see "Broken Flowers." We saw the movie and enjoyed it, and also saw that the fiancee's female counterpart had gone from a small b-cup to a generous d in the time since we had last seen each other. Neither of us were sure exactly what the protocol is for this situation: Address the new chestiness, or ignore it? By ignoring, I believe, we run the risk of coming off as silently sitting in judgement. (There is no way not to notice, by the way, especially since she was wearing a tiny top, so our failure to acknowlege could not be written off as an oversight). For me to say something ("bueno tetas!") would be inappropriate, and I would have rightly incurred the wrath of the fiancee. So my conclusion is that the fiancee should, in such situations, say something (either with all of us there or when the ladies are alone) like, "did you specifically instruct the doctor to attach them to your collarbones or was he just thinking outside the box?"
That way it's out in the open and nobody has to be uncomfortable.