My wife actually did this to me, although it was with a GROUP of people. I just said "Have a good time," and went to bed a little earlier than usual and made sure all of the lights were out and the house was locked up tight when she got home. ROYALLY pizzed her off, but she got the message, and she never tried that level of disrespect again.
there is a HUGE difference, between "I'm snubbing you, by going out to a non-threatening event", and "I'm snubbing you for dinner, AND looking to get involved with another man by going on a date".
What she's doing, is the latter, at least in appearance.
My current status: june 2006. Wife ran out and filed D. Finalized Jan 11, 2010, after 12.5 years M. 3 wonderful sons caught in the middle