For the record, I absolutely do not see this from the same perspective as Dom R. No disrespect intended (since Dom sounds Italian!!). I see it that she is trying to 'rationalize' how good the current situation (separation) is and was trying to do a sales job on you for that.
If your wife is like mine, she is trying to convince everyone around her (including herself) that all is great in the separation. Basically, it is just an extension of everything being okay and normal with what led up to the separation. I personally wouldn't read anything more than that into it. She wants to think that she didn't screw up...
As for your conversation with her afterwards, small bump. Just keep doing what you were doing before, don't pursue, and don't talk anymore about a building block. Talk is meaningless... either make it happen via your deeds or end up with a friendship between the parents.