Rock on TP.
I've been testing reactions occasionally on complete strangers....especially in other towns where I'm extremely unlikely to run into the same people again. A couple weeks ago I was chatting with a woman about something...I don't remember exactly what. I mentioned something about having to get something for my girlfriend and then meet my wife somewhere.
I think she was halfway through answering my question when she suddenly paused and asked me, "Did I just hear you mention your wife and your girlfriend in the same sentence?"
"You caught that did you?!"
The rest of the conversation carried on relatively unimpeded. But the look on her face was rather amusing.