I think it's moments like the one you're describing that make it so important to give up the mindreading...Who knows why your W asked that of you - it could have been a test, it could have been something she finally really meant...but either way - you have to be consistent with who you are - and it seems that's exactly what you did - and I think you're response was just right...
If it comes again, you can add something along the lines of, "I would prefer to work on our marriage, but I accept your decision, and want what makes you happy." There's nothing wrong with that reminder - but I don't think you should say more than that - or cling in anyway - which is to say, that I think you handled her request (if that's what it was) perfectly.
A lot of people that care about you - see you in pain or sadness - will likely encourage you to say more or show more than you should...and while it's hard to turn off their advice, I think keeping your emotions and feelings under control is the best thing you can do.
Have you read many of Coach's older threads? If not, I would highly suggest spending somet time going through his experience here...I think you'll find a lot of great insights in his threads.
